I assume you're already familiar with the Devil Fruit number theory.
If you haven't, it's based on a SBS.
56 (Gomu) + 110 (Hito) + 87 (Hana) + 43 (Yomi) + 29 (???) = 325 (Sanigo = Sunny-go = what the crew call the ship)
Byakko, the White Tiger, will be categorized as Cat Cat fruit, or Neko Neko no Mi.
From some sources I've read, Neko can be read as 2.9, the missing number.
Here's the alt reading I've seen
[automerge]1610350593[/automerge]
Oh, and Yamato is "caged" to Onigashima. She hasn't show up "outside/WG territory" officially. Because of this, it makes sense if she doesn't have a bounty (because she's not a threat to the WG/hasn't oppose WF/hasn't damage WG interest etc)
However being the daughter of a Yonko can also make her to get a bounty, so it also makes sense too if she have a bounty.
Conclusion, Yamato having or not having bounty may affect your personal preference/requirements/narrative, but it won't take away anything from her chance.