I'm just riffing. To be honest, I don't know exactly what defines a Jedi. If it's explained in canon, then I've missed it or forgotten it. A Jedi isn't just someone who uses The Force. You have to be trained. Broom Boy wasn't a Jedi. Blind Chinese Guy from Rogue One wasn't a Jedi. There's the Jedi Academy or whatever it's called, so apparently you have to be trained. As I said, Luke trained with Yoda, but I don't remember Yoda ever telling Luke that he's a Jedi. If anything, I thought he said his training wasn't complete. Or maybe Yoda did finish his training, because I also remember Luke saying something like "Then I am a Jedi" in a moment which was clearly supposed to be meaningful (but which kinda failed for me).
So what makes a Jedi? It's not just someone who's Force-sensitive and trained. Is it an official designation, a "rank" that you earn? That would imply that you have to reach a certain proficiency level, which also implies some kind of test. Grogu told Ahsoka that he trained with different masters for years. We've already seen him stop the mudhorn and levitate it, block a blast that would've incinerated them, and of course steal the mint macaroons. But that doesn't make him a Jedi.
Ahsoka considers herself a former Jedi. She left the order (or was asked to leave, or something). So again, it's more like a rank or title. Then you have Jedi Master, again implying that there's some kind of evaluation, and one or more persons who grant you that title.
Again, I'm just riffing. If this is all explained somewhere canonically, I'd love to hear it.