You can find the history of API/ABI changes in glibc since 2011 in this table:

https://abi-laboratory.pro/?view=timeline&l=glibc

Granted it hasn't been updated since 2023, you can still see the trend with removed symbols in each version.

I looked into the changelog for 2.34, which this website claims removed 24 symbols.

* 9 malloc debugging variables were removed, though their symbols actually remain for backwards compatibility they just don't do anything. * vtimes was removed, but the symbol remains for backwards compatibility

Those were the only changelog entries listing removals. None of them cause linking issues. The 9 that did break backwards compatibility are a set of debug tools that don't work for alternate memory allocators and the functionality can be brought back with libc_malloc_debug.so.

Maybe the changelog's incomplete, but this actually seem pretty tame to me.