I'm not aware of any, but it would be cool to crowdsource! It's fairly simple to upload your own sticker pack to Signal
https://support.signal.org/hc/en-us/articles/360031836512-Stickers#sticker_creator_steps
So if you stick to those guidelines, you can make your own. The file size requirement is a bit harsher than other platforms, but you can always speed up the animation. It ends up looking more emphatic lol
While we're at it, having some more country specific packs would be cool. Right now there's not much, this is what I found under Canada
https://signalstickers.org/pack/265d8aa1970747da808ecb5bef858f66