Там, конечно, по этому поводу случился очередной смачный срачик, но все уперлось (сюрприз-сюрприз) в нежелание авторов в ABI break:

https://github.com/harfbuzz/harfbuzz/issues/2524#issuecomment-2784820781
https://github.com/harfbuzz/harfbuzz/issues/2524#issuecomment-2785137253
https://github.com/harfbuzz/harfbuzz/issues/2524#issuecomment-2785205469

"Any ABI breakage is going to upset an even larger group of people. Not to mention that we already made a promise to never change ABI (or API) in a backwards-incompatible way"

"We are at HarfBuzz 11.0.1 now and it's ABI compatible all the way back to 0.9.x series from 2012"