MAC OS Monterey calendar
I found a solution! After weeks of researching, resetting the Calendar app, changing user accounts, going to safe mode. Nothing worked. The only solution I haven't tried was reinstalling the whole Monterey system, cuz I thought it would be a hassle and I would have to backup and then reinstall all the apps. It doesnt! You can easily reinstall the system and the Calendar app search works like a charm!
If you have Apple M1 silicon chip mac:
1. Shut down your mac.
2. Hold down the power button/touch ID until the startup options icon appears
3. Now select Options, and click Continue
4. When a window appears with options like restore from time machine etc, choose Reinstall MAC OS Monterey.
5. Follow instructions.
BAM! Calendar search works like a charm.