However, it is high time you consider taking up a non Oracle distribution if you are looking for support. Rely on any distribution you can build yourself than going for a vendor downloadable distribution like Corretto. No vendor lock ins, even the benevolent ones.
My current favorite is https://github.com/AdoptOpenJDK
I'm keeping a watchful eye on if any of these repos close/lose support. If anything of that sort happens, I'm ready to drop Java and rewrite it.
So things aren't as dire as "support stops in 3 weeks!!!". But moving to 11 isn't a bad idea anyway, since you're going to have to do so sometime anyway. (interestingly Amazon have (so far) only committed to updates for Corretto 11 until August 2024...)
are you using app servers? will you need to migrate/upgrade those? Are all your dependencies J11 compliant?
Its a reasonably big jump from JDK8 -> post-9 with modules. But should be doable