wait what do you mean by tsundere uke and can you give examples on other shows? thanks!
Examples on other shows is always hard for me for some reason but a tsundere uke just means the one who is being pursued in the relationship is also reluctant and tends to express their emotions as anger and rejection regardless of how they feel. It's a specific archetype that's fairly common.
There Kit from MarkKit, SangWoo in Semantic Error... look, there's a lot but I'm in my way to work right now and just kind of wanted to try to answer this anyway. People are free to add their own in comments or tags or whatever, love y'all.
Anyway, tsundere also means that they tend to hide their love and/or affection or caring. Uke is literally just the yaoi term for the one being pursued in the relationship. They tend to be reluctant to love, to not want to love, to repeatedly reject the seme aka the pursuer in the relationship.
There are genuinely tons of them in BL and yaoi, they're all over the place. Very, very common archetype. Cupid's Last Wish had an extreme version of this. Ugh, they're so common and I still can't think of any lol. @absolutebl can absolutely (lol) help with this. The ruler is charts and keeper of organized knowledge.
A much better defintion (with examples) by the hero of all organized knowledge, @absolutebl here and here and here and here.