Does Elements 24 support Canon CR3 RAW files [Canon 90D]

Yes if you were to look on the page for supported cameras that Peru Bob linked to, it would be found that the Canon 90D

requires Camera raw 11.4 or newer and since Photoshop Elements 2024 installs Camera Raw 16 when installing Camera Raw from the Help menu, it will indeed support the CR3 files from your Canon 90D.

After you install Photoshop Elements 2024 go to Help>Install Camera Raw to be able to open your Canon 90D CR3 files.

What Canon camera do you have?

I've moved this from the Using the Community forum (which is the forum for issues using the forums) to the PSE forum so that proper help can be offered.

Scroll down here to see a list of the forums:
https://community.adobe.com/

Post that here where the Adobe engineers read all threads:
https://adobe-video.uservoice.com/forums/911233-premiere-pro

Yes.

See here:

https://helpx.adobe.com/camera-raw/kb/camera-raw-compatible-applications.html

and

https://helpx.adobe.com/camera-raw/kb/camera-raw-plug-supported-cameras.html