There are a few posts here about this situation. I am on the newest version of Premiere (23.5.0. in 7/2023).
I used the remove attributes-function to delete unnecessary data from tracks. Afterwards it came impossible to generate new keyframes on audio tracks. It does not matter if the selection is on the "read", "touch" or "write" or any other, the keyframes do not come up. This is supposed to be a known bug based on the forums and back in 2017 there is supposed to be a patch that fixed it. However, it does happen again. Reinstalling did not help.
I think posting a video of what you are doing might be helpful here.The Remove Attributes command is for clip audio effects only, and in your post you mention trying to change the track keyframes.They are two different systems and it is unclear in you post exactly what is happening.Also, they two systems are visualized differently in the timeline.
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