It's definitely happening to me, even though I'm not a recognized/memorable poster on this forum. I had hoped to join in and post a lot, but that sort of went out the window.
Dh is coming up on one year of retirement and since that time we moved, so we explored a bit of local stuff and then I started painting the interior of our house, learned to paint and remake furniture (not refinishing but painting over stain, etc), sew slip covers for furniture, make some of my own wall hangings (thanks to nothing in the stores!), and now I'm starting watercolor painting. All of that stemmed from the pandemic emptying out stores of household things plus me not liking the few things I did see. I'm a do-er, so the lack of home items led me to make my own stuff.
In between all of that, I'm also still trying to get a handle on the financial parts like rolling over a 401k, ROTH conversions, etc. I'm as busy as ever! I can't imagine how busy I'll be once we feel like we can travel again.
OP, I'm glad your absence was due to your having fun in retirement!