Currently nothing in terms of formal volunteering, other than the odd irregular photoshoot for the Siamese Cat Welfare Trust.
I was involved in my local branch of Cats Protection for close to twenty years, helping out with fundraising (as a buyer for bits for market stalls / raffles etc), running the branch website and lost & found, providing a space for emergency fosters and doing all the photography the branch needed. But just prior to Covid, the longstanding co-ordinator stepped down, and all the people who were on good terms with her, were then quietly shunted to one side. That included me - I wasn't even told my services weren't needed any more, they just went silent on me. I never got a thank you either - not that I expected one, but it would've been nice...
I've also volunteered for the local branch of the Red Cross. It was more my mum's thing, but if I was free I'd go along too, to do the thankless and often rather grim task of sorting out donations.
Slightly more informal volunteering is stewarding or dogsbody-ing at cat shows if I'm not judging. Madam Lexi doesn't enjoy showing, and I quite like days at a cat show, so it's a good thing to do. Plus if I'm in the pedigree section (I'm a household pet judge), I get to learn about all different breeds of cats, and how to handle and present them. It's very rewarding, and I'm always up for free cat cuddles.