It does seem to go
@SleepyBunk I did wonder if it was a simple case of not burning my energy up at the same rate since I've been in a prolonged isolation since November. I do get my fill of exercise every day and do some strength stuff (but less so now the gym is closed)
Good(-ish) to know my experience is very similar to others on the thread, struggle to get to sleep and when I do wake after about an hour or so, have to go through the same struggle again. I tend to drift through podcasts, music, rambling Buddhism stuff on Youtube and movies. Then the working day begins and I feel absolutely knackered ! Just did a morning meeting looking like Rick from Rick and Morty 
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@LuckyLinda3 It's difficult to read anything into him being back on the apps after you've ended things with him. Some people do think they have to go off in search of what they lost right away, or even in search of some validation. Being dumped is a very direct blow to the self esteem and interest from other attractive people is a salve to that for some.
From my perspective (which is solely due to me and not to be ascribed to all men) it seems he's been in a workplace which is very much under strain through the early months of your relationship. In these sorts of team environments, he can't really avoid mucking in with everyone else. He gave you a heck of a lot of time actually for a new-ish sort of relationship with daily meetings. That's unusual and would indicate to me he was really keen. But he did have to work and since then the pressures on the health system can only have increased massively. While you're entitled to look for what you want and need, it sounds like you made an ultimatum, and his solution was to call pause until he became freer and could deliver what you want. Am I correct there ? Do you think you took into account the whole context in which he's now operating ?
He's taking the friends thing literally, when most would interpret that as 'let's walk away without any rancour', so clearly values the contact with you. Truthfully how has seeing him on the apps hit you ? Do you feel sick at the thought of him being with someone else ? Or do you feel aggrieved towards him ?