Not all at once. It was a process and I was very patient.
I also thought one had to wait for the sailing to end and then the FCC remainder is issued.
However I read here, on CC, that if you call Royal or your TA they can help you out with this. So I called Royal first. They had to give me a call back after consulting with "the right department". The call back informed me to call the TA that had the booking I wanted part of the FCC applied to. I did. That TA did the job in 3 days. That cruise is all paid for.
Then I called Royal again to ask if I can apply the remainder of the FCC to another cruise I had booked with another TA, since I read that that can be now done (Not sure if this is a temporary courtesy that Royal is extending due to all the issues of cruises getting cancelled and people wanting refunds and FCCs and what not).
Royal said yes, I had read correct and they would do it immediately (if booked directly with them) but I had a TA on that reservation so I would have to have the TA call to get it done and yes, once they (the TA) call to initiate the request, they will do it. So I requested the TA to call. Took about 2 or 3 weeks to get everything done. And the second cruise is paid for.
I still have some leftover FCC which I can use for a short cruise. But I will sit on it for a bit, since my bag of patience is tanking almost zero. So after a while of some patience replenishing and some months of ohhhmmmms, I may start thinking about how to put the last remainder of the FCCs to use.
I hope you have not had to take asprin after reading this! 😉😁