I have so many, it's a bit overwhelming at times! I certainly never got bored during lockdowns.
I am learning piano (bought myself a keyboard over lockdown) - loads of YouTube videos where I can play along to my favourite tunes. I'm not skilled at all, total beginner, but the easy (slowing down to half speed) videos are good to start with.
I ride my bike as often as I can during nice weather to the nearest rural(ish) areas for exercise.
I grow outdoor plants (also good exercise) using container pots and bagged compost as for years I didn't have access to a garden and am still in the habit of container gardening. After work and sleep, this takes up the majority of my time!
During winter I got really into those paint-by-number kits, very soothing.
I research family history using ancestry.co.uk's free subscription weekends/occasionally buy a month if I want to research a branch in particular.
I read a huge amount and am particularly into historical novels and autobiographies, what's nice is the BBC adaptations usually fit my interests (The Pursuit of Love is a current favourite of mine).
Couch25k was good but I think I overdid it; got a bad foot injury in Week 8 so have eased up on that.
Also used DuoLingo in the past as found it fun to get into competitions with strangers!
PC gaming - I've found a few I like based on boardgames I play.