I'm experiencing the same issue!
I first thought it is because of a mod, as I added one that changes the cooldown to 0, but I removed the mod and cleared localthumbcache, and I'm still getting no gallery sims suggested.
What I tried:
- I switched all mods off, again cleared cache, started a fresh save, and still no gallery sims.
- I disabled and re-enabled the setting for gallery sims in the game settings, still nothing.
- I tried variations of filtering for different age groups, having a custom photo, I also accessed the gallery just before to double-check my gallery is online correctly (and it is), I'm also playing in online mode.
- I have a lot of Sims in my personal gallery, not sure if there is any limitation maybe? I actually deleted some, to test if it is that, but no change.
- I tried it with the setting to filter down only on favourited gallery sims once disabled and once enabled, both still didnt show me gallery Sims.
- I tried a game repair - no change.
On the first day when the Pack came out I did see 1 gallery Sim each for 2 different Sims in the same household, so I know it worked at some point. I even favourited them and added them to contacts, and both got added to my personal gallery and the manage household screen. I had a date with one of them once.
After that I never saw a gallery sim suggested anymore, and I tried multiple households on a legacy save and on a fresh save, without mods.
I also went back to the save file where i just started playing with the new patch, the one that previously showed me a gallery Sim in the results, but it is not showing there anymore either.
I'm on a Mac currently with my game (in case this makes a difference).