If you want to see them more frequently you need to tell them and maybe do something to meet them half way.
I.e. what steps have you taken or are you going to take to combat your anxiety? My DM plays on this when it suits if she doesn’t want to do something. If she wants to do something it is never referred to.
Could you maybe suggest meeting somewhere halfway literally for lunch or to go for a walk in warmer weather or do an activity.
The phone works both ways nothing to stop you phoning or messaging a little more frequently you shouldn’t expect them to do all the running especially if you want more contact.
How well do you treat the partner and please don’t make assumptions. My MIL thinks and has said as much to SIL and myself that I/we both control DH and DBIL and stop them visiting and contacting her. Whereas, in reality he is happy with me and life and BIL is happy with SIL and they both think visiting is hard work and honestly if it wasn’t for us reminding them she would see and hear from them a heck of a lot less.
I imagine you probably have more time on your hands could you make yourself a little busier (then you would have more to chat about when you do meet or speak) than them and you are the one wanting a change so you need to think of a plan or plans of action.
Just saying sometimes there are two sides to every story and sometimes times change. My GP’s especially my grandmother was keen on entertaining, having her family round and putting on a buffet or at least cake and sandwiches. So everyone visited them. My DM makes little to no effort and doesn’t even offer us a drink even if she is having one. The kids now grown up early twenties are sometimes offered a biscuit (to eat in the car as they are leaving). When I visited with them when they were little she would put a film on for them with the tv turned up loudly she rarely talked to them or anything.