Email Search Not Working - Big Sur

Hello and welcome to Apple Support Communities, patrick254!

We understand you're having trouble with the search feature in Mail on macOS Big Sur. We'd be happy to point you in the right direction.

You'll want to reach out to Apple Support for assistance with this: Contact Apple for support and service

Have a great day!

Not addressed ! it is still broken with the latest 11.2.

You can take a look at the biggest thread about it here:

https://discussions.apple.com/thread/252035294?page=15

In short, there is no definitive solution, the best you can do to have search work again without logging off is by force killing the process 'corespotlightd'.

Please report the problem to Apple, it will help us all:

Feedback - Mail - Apple

Feedback - macOS - Apple