Outlook 2021 - either accepting an e-mailed invitation to a specific calendar, or moving from one to another?

- When I get an invitation via e-mail I only seem to be able to accept it into my default calendar. I don't seem to be able to choose which calendar it gets imported to, like I can with Thunderbird. I can't find a way to do it. Any ideas or workarounds?

- I thought maybe I could move a meeting/event from one calendar to another, but according to [this forum thread](https://answers.microsoft.com/en-us/outlook_com/forum/all/copy-meetings-from-one-calendar-to-another-no/27787ab4-07ad-4480-b679-60ba280e08b3?page=1), that is also not possible, as I get the error "Copying meetings is not supported." when I try. Thunderbird can do this also, and Outlook used to be able to.