There is also kind of a built in sponsorblock for YouTube on mobile. If you double tap to skip 5s repeatedly, a button quickly pops up to skip ahead (not explicitly about sponsor segments, but I'm sure this is what it is used for 99% of the time).

FYI this is a premium-only feature. It's one that I am very thankful for. I pay a pretty penny for youtube and I don't appreciate "creators" end-running around that to peddle their shitty AG1 supplements or woodworking tools I can't buy in my country.