Like I said in the title I’m building an asset that I plan on selling on the asset store. My question is am I able to use TextMeshPro?
Even if someone answered this, would you really want to take legal advice from a random programmer?
Read the license on the asset in question. If you’re still not sure, hire a lawyer to interpret it for you.
If you don’t want to do that, then the only other thing to do is to play it safe and assume the answer is ‘no’.