Unicode phonetic symbols

I recently upgraded to Catalina (10.15.7). I had been running Yosemite (10.10.5). In Yosemite, one of the keyboard options was direct access to the section of unicode with phonetic symbols and diacritics. I use phonetics extensively. The limited access available through Show Emojis and Symbols that only includes accented Latin characters lacks the crucial combining characters (and the Greek based phonetic characters as well). This is making my life much harder. (I can get the Greek through Greek, mostly, but with a lot more keystrokes.)

Is there anyway to get the old æ Phonetic Alphabet added to my options under Show Emojis and Symbols?