Mail not showing recent emails after Sequoia update on my iMac

Since yesterday, after upgrading my iMac to Sequoia (15.1) in Mail, I can see the lists with all my emails, but if I search, I am only shown some ancient messages (years ago). In my mailbox (Gsuite), there are about 70,000 messages. I don't understand if this has anything to do with the indexing of the messages, and I also don't see any window telling me that Mail is performing that operation.

Does anyone have any suggestions?

[Re-Titled by Moderator]