Is this referring to the 50 note selection limit? Hopefully, it's temporary
Some clever users have worked out how to increase the limit
Can you sub-divide the ToC into sections?
Personally, I'm still using the Legacy version - no limit
Install at https://help.evernote.com/hc/en-us/articles/360052560314-Install-an-older-version-of-Evernote
Also, instead of a static ToC, I use a dynamic note list (saved search)