How can I see Reminders notifications while recording a screen?

Hello Upper,

Thank you for reaching out to Apple Support Communities.

Your notifications should still be active while performing s screen recording, unless you have a focus enabled:

"Use QuickTime Player

1. Open QuickTime Player from your Applications folder, then choose File > New Screen Recording from the menu bar. 

• If you see the onscreen controls described above, follow those steps.
• If you see the Screen Recording window described below, follow those steps.

2.Before starting your recording, you can click the arrow next to the Record button  to change the recording settings:

• To record your voice or other audio with the screen recording, choose a microphone. To monitor that audio during recording, adjust the volume slider. If you get audio feedback, lower the volume or use headphones with a microphone.
• To show a black circle around your pointer when you click, choose Show Mouse Clicks in Recording.

3.To start recording, click the Record button and then take one of these actions:

• Click anywhere on the screen to begin recording the entire screen.
• Or drag to select an area to record, then click Start Recording within that area.

4.To stop recording, click the Stop button  in the menu bar, or press Command-Control-Esc (Escape).

5.After you stop recording, QuickTime Player automatically opens the recording. You can now play, edit, or share the recording."

More details can be found here: How to record the screen on your Mac

If the issue persists, can you provide a few more details? When did you first notice this? What is your exact macOS version? Also, are any Focus Modes enabled?

Cheers!

Understood Henry Upper,

What we'd recommend then is to contact Apple Support so they can do a deeper dive into this with you. They can help confirm if this is or is not expected behavior.

Thanks for using Apple Support Communities!