I am 100% on your side @BendyWendyCheesyFeet and I speak as the one who moved away. My extended family (cousins/aunts/uncles) and 2 adult children all live in the town I grew up in (22 to 25 miles away... around 1.5 hours round trip) My parents passed away some years ago...
Me and DH (both nearly 60,) are in the next county, (on the very cusp of the border.) The next road to ours is in the county we used to live in.
Anyway, so I can count on the fingers on one hand the amount of times my cousins and aunts and uncles have visited me in 10 years of living here.
Both DC left uni in the mid 2010s, and moved in with their partners, into a place in the town we all grew up in, and both DC have never lived out here where we live now.
We visit our extended family about every 8 weeks, but as I say, most of them have only been here about 4 times in 10 years. We visit our 2 DC about every 3 weeks, but they come here about every 7-8 weeks, sometimes separately, sometimes together. They are very busy professionals, and have busy social lives, so like many others, don't have masses of free time.
Their partners families live in the same town, and within a mile of them, and I'm not gonna lie, their families get a lot more of them than we do. Their parents pop in once or twice a week, their siblings drop by for a coffee after college or work once or twice a week, and they go see them, and the nans and grandads once or twice a week too.
They look after each others pets if they go away, and are close by if (eg) one of them is ill/has covid and needs to isolate, so they have someone to drop off shopping and so on.
Whilst we love it out here (we moved into the wilds/woodland etc,) we do have to accept that people generally won't visit us very much, and it's almost always us who have to make the effort.
We were quite isolated during covid too, and didn't see any of them for 4-5 months. Luckily neither of us were ill, but if we had been, we would not have been able to depend on family as they were in another county.
Even when we weren't in full lockdown, we were in different tiers, and couldn't see each other much There were a couple of people in our little village who popped a piece of paper through every one of the 53 homes, offering their services, should anyone need it (for shopping/food etc.) But we had no family support because of the lockdown.
So yes, you do (sadly) have to accept that people probably won't visit you if you move away. Even if it's only a 50 mile round-trip like us.
I do wonder actually how people cope long term, if they move say 300+ miles away, and especially to another country. I wouldn't move abroad tbh. As someone said on a similar thread a few weeks back, you are basically losing the relationship and closeness with your family when you leave the country, because there's no way you can maintain the relationship when you move to another country, and you cannot support your loved ones (or have them support you,) if you become ill or immobile.
In addition, if you move abroad as a young child-free adult, you will need the support of your parents... And it won't be there... I know quite a few people who moved away, overseas - then had kids after a few years, and then desperately needed parental support. Sadly, parents cannot support their children when they're in another country. It's hard enough if they stay in the UK, and are 300+ miles away!
Similarly, adult children cannot support their parents if they move away either.