I speak and type in Russian but occasionally I need to type some words in the Kyrgyz language. The alphabet is the same as Russian's but with three additional letters.
Up until macOS Ventura, holding down keys о, у, н in the Russian PC input source would give me a menu with accent letters that contained needed Kyrgyz letters "ө", "ү", "ң". That was incredibly convenient for me because to get these letters in Kyrgyz layout you need to also hold down Opt which is very inconvenient.
In macOS Ventura, the behavior changed. It's not as if it completely stopped working, it started behaving as an iOS keyboard. Almost all accent keys are gone except for "ё" and "ъ". How can I roll back the behavior to the old one? Having plenty of options in accent keys was incredibly convenient.