Sorry OP, but it is difficult to offer much solace or advice without knowing more details. But the questions that I feel need clearing up are probably frowned upon, if not banned outright. I don't suppose this helps much, but for you OP, and anyone else reading this, if anything I say or ask upsets you, or enrages you, or encourages any other negative emotion, please believe me that that is not my intention, and report me if necessary.
You say that you do not live in the UK, did you have any lockdowns due to Covid in the last two years, and roughly how long did they last for, and were they a ban on going out completely (apart from essentials), and not being allowed to see people who don't live under the same roof as you?
I feel that this question is relevant as it could help to explain your SO's desperation to do "normal" things, like going out and going on holidays, when in "normal" times they might not be so much of an issue. When we are denied what we consider to be our basic human rights for too long a period of time, and when we don't know when, or even if, there is going to be an end date to this imposed imprisonment, and if on top of that many people fear that they, or their normally healthy loved ones, might not even survive this awful time, then the more usual parameters of what should be considered reasonable, can or even probably, change - and quite considerably.
Do you live in a very different part of the world to the UK OP, and is it the land where you were born, and is it your SO's homeland as well? I think that as you both have older family members that live in the same country as you, that it is probably both your's and your SO's homeland, but that is by no means a certainty, as travelling around the world, and even living in other countries has been relatively easy for quite some time now. I am asking these questions - without expecting or needing an answer to the specifics - because, if you live and come from, say Asia, and if most of us on Mumsnet live and come from Europe, North America or the Antipodes, then even in this day and age when we can see and hear, through TV, films and books etc about each others countries, lifestyles, cultures etc (and yes, we can have different lifestyles etc within our own country too, but not usually to the same extent), then we (actually, I think I should stick to "I" here, and not to try to speak for anyone except myself), then I believe that the differences between our peoples, can and probably do, colour our responses in a way that might not be so helpful for someone from a different culture.
I am in no way trying to say that one person's culture is better than another person's, but I am trying to offer - very badly, I admit - my viewpoint that what you and your SO might consider fair and unfair, might differ quite a lot from what me and my family (my familia culture) might consider to be fair or unfair. Therefore if your SO comes from the same country as yours, but maybe from a different culture or class to you, you could be asking us to advise you on the fairness and way forward on your issues, when to a certain extent, we cannot appreciate those issues in the same way that you do.
Of course the vast majority of us are all human beings (I am thinking that people like Putin, Hitler etc might not actually fall under that banner), and some things are universal and some needs and desires are universal,
eg. We all need food, water, defence against the widely differing weather conditions, health, love and companionship etc, but what some of those things look like to some of us, can be widely different to how they look to others.
So really my questions are meant for you to answer to yourself, but on here too if having considered it, you do feel it would be helpful to have some of the Mumsnetters viewpoints. I am very worried that at this point I have managed to insult you by seemingly thinking that you might not have already thought all of this through, if I have managed to upset you without meaning to, but in knowing that the possibility is there, then you have probably found most of what I have said to be very condescending, and all I can do is to either decide not to post this, or to keep on apologising if I have upset you!
I suppose that nearly 1.5 hours after I started this, all I am trying to say, is that if you could give us more of your background information about where you live, and whether you and your SO have very similar backgrounds or not, then we may be able to adjust any advice accordingly, or even suggest somewhere (either on Mumsnet or elsewhere) that might be able to give you more relevant or helpful advice. Both you and your SO are in my thoughts, and I wish you both the best outcomes for yourselves.