Because of scheduling issues and Covid stuff, my daughter ended up taking Latin 101 at a college instead of the next in her sequence in HS. There is a place the commom app asks for other courses completed, just put it there.
And then send the transcript from the college to where she is applying. They will match it up and you can see confirmation they received it in the portals for the colleges they apply to. Most colleges use Parchment and it is electronic. Costs around $10, I think.