"How do I get my Macbook Pro 2024 to read all SD cards?: Half work and half do not. They all work in my Mac Studio and cheap USBC stick SD readers on my MacBook Pro. So the SD cards are working but the reader only works with some SD cards. Is there a way to fix it? I would like it to work on all SD cards.[...]"
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Seeing SD Cards on a Mac:
A. Deletion of your Question:
These are just user-to-user forums. You are not speaking with Apple here. No one here, but moderators, have the ability to delete your threads.
B. Verify if this is Insertion is Seen:
Hold down the option key, and then click on the Apple menu (top-left corner of your screen). Then, select System Information. Net, external the Hardware list. Finally, select "Card Reader". See if it is detected.
Screenshot:

C. Single-Out this Device:
Are they reading on other devices? If so, then it is an issue with this Mac. If not, then it may be the cards themselves.
D. Turn Off the Lock Switch:
On the side of the SD card, there should be a little switch. Move it to the next position, seeing if they are readable.