Yeh, the regales have been difficult for me too. They are called one-leaf wonders by plant people. I have not figured out the secret with them yet.
Sounds like another good addition to your sunroom with the plant your friend is giving you.
Once I clear out my sunroom I’ll be able to see some aroids I have not seen in months. I have not seen my metallicum since bringing in all the plants last October. I’ll post some pictures if I find anything interesting.