This is probably not going to be enormously useful, but I’ve learnt that it’s a mental attitude thing. People get in a similar tiz about sleeping during the day when working nights; employing black outs, white noise, fancy earplugs and the like. None of this is the issue; it’s worrying about being woken that is the problem. Everyone wakes multiple times during a sleep; it’s what happens next that’s important. People who sleep badly wake up and immediately become aware and stressed that they’ve woken up. This them means they think about it and raise their level of consciousness as a result. It’s a bit of a vicious cycle. I’ve helped my other half get out of this pattern somewhat; the key is learning to do a kind of mental shrug, turn over and drop off again, without engaging any thought processes. The key is the realisation that being woken is not the issue, it’s the staying sleepy and going back to sleep that is important. This is a LOT easier to say than do, and needs practice, preferably when your not worrying about anything else.
Good luck.