In my case: we work in separate rooms; we take walks together, watch movies and play chess sometimes. Not too much, looking for inspiration.
Before the pandemic, my wife and I worked from home while our kids went off to school. That made it really easy to have "special" time without concern for the kids hearing us or walking in on us.
With schools doing remote learning, that's no longer possible. Which means we're at the mercy of whenever the kids are soundly asleep at night. Which means we're more tired during those encounters, and it messes up our sleep schedules.
It's one reason I'm really, really looking forward to school returning to normal next fall (fingers crossed).
Try to make some artistic photos of each other. Try to research some poses and lightning and recreate it with whatever you have available.
Try playing some board games, like Carcassonne.
If you both like puzzle try to race to solve a puzzle (like Consecutive Sudoku) or solve it together.
Buy and assemble some furniture or some toy kit together.
Learn to play some computer game together like Don't Starve Together.
Basically have fun together by competing and cooperating and creating stuff without any expectations. Do stuff you never done before.
I recommend Kenjis book "The Food Lab" and just going through the recipes and learning the science behind them together
I don’t really have much to offer beyond what you’re doing but spontaneity is nice. Today we both felt like shit with what went down in the capitol yesterday do we said fuck it, called out of work tmrw, and we’re currently in a hotel room on the coast drinking beer and eating pizza on the bed (well, we were, now it’s “friend phone time”).
Aside from that: working out together and drives out in the countryside.
We cannot work in the same room.
Actually her 50% time for kids works out great. My kid was 100% time and while I really really enjoyed the time I also didn't work at all for those years. Or rather I tried once for about 18 months and it was really almost impossible.
For the separate time, try some new hobbies. I started playing guitar again, wife started knitting.
I think it's fun to pick a direction and drive in it for a few hours. For me it's been a great way to discover more of the less-travelled Bay Area counties where crowds can be hard to even come by: https://www.youtube.com/watch?v=RXh0bQIZw1g
It might not comply with the exact wording of "staying in [our] residences to the extent possible", but it seems foolish to think I'd be hurting myself or anyone else going between my garage, an enclosed but well-ventilated glass bubble, and my garage again. I do avoid stopping anywhere however :)
Also some day trips exploring nearby sites that were still open during shelter in place.
Playing different video games (Don't Starve, Animal Crossing, Luigi's Mansion).
Actually love the increased time together. I thought about heading up with chess against each other too. We played some Jaipur and Dominion.
Though in the end, we moved out and started to go nomadic.
• Cook during the work hours, and see if you can tag team the cooking. Hilarious "failures" are the norm here.
• Plan and make a gift for someone meaningful to you both (if you're into arts and crafts, etsy-style, or any other kind of maker type activity)
• Take an online course together.
• Adopt a pet (unless you already have one, allergies, etc.)
DM me if you want my sensei's contact details, she's joyful and makes the sessions great.
If you’re both into it, maybe a multiplayer game like Diablo or a Lego game could be fun.
My wife makes fun of me when I propose that.