Harry Krause writes:

I know we have some Floridians here, and I'm wondering why she is the
only announced GOP candidate for the seat. I already know about her and
her politics.

I am a Floridian.

I am a Republican, avid even, and enrolled so.

I read the papers.

And I have no idea why she is the only announced GOP candidate for the seat
(if that's the case).

I would speculate, repeat speculate, that due to the incumbency advantage,
no other flesh-and-blood Republican challenger would stand a chance,
either, and no one has been recruited to fall on the sword for the party.