Is this trade worth it?

Hi! New-ish player here! I recently got a shiny Regidrago and was super happy about that. He is quite rare and it was on my first raid with him so that is always nice.

Anyways. I recently came back from a break and realized I have missed every Rayquasa event ever. So I thought: Why not trade shiny Regidrago for shiny Rayquasa? So I posted that in the pokemongotrade subreddit but not a single soul commented. So I made another post where I offered him for a regular Rayquasa. The regular one is a guaranteed lucky though since it was caught before 2020.

All I want to know tho. Is it worth it? Is Regidrago to rare or should I take it? Or should I trade him for a shiny Rayquasa?