We would like to be able to use a ligature character to connect vowels under a single rhythmic value (note) in lyrics entry. This is common in Spanish and Italian lyrics, and occasionally appears in English lyrics. Perhaps it could be invoked with a special command when entering lyrics, e.g. (on Mac) Shift-Option-Space or something like that.
The closest I can get with my couple of hundred font faces is this: a ⏝ el, using a "Math Symbol" for the ligature. (Apple Mac OS Ventura 13.3.1, high spec 2017 iMac).
Because this is not a regularly available type character in the majority of fonts, you may have to create something, of search for a special font face for lyrics.