I think if he wanted to, he would. I wouldn’t be surprised if he wants to take a break and/or look for a more stable job. I wouldn’t expect anything soon or ever personally.
I just hope he opensources apollo in it's entirity. I would say there is no reason for him not to. Maybe this app can pick the best parts from the codebase and integrate it into this app.
There's a great reason for him not to: he can create a paid Lemmy client based on the code. Dude made way too much money on that piece of software to just give it away.