https://docs.blocknet.co/xlite/access-coin-daemons-via-rpc/
the "importprivkey" method is disponible too, you can use it like this:
"importprivkey", "params": ["privkey"]}'
http://rpcUsername:[email protected]:rpcPort/
then may need to restart xlite if coins don't show up.
Must keep in mind doing this can be dangerous still:
this address won't be in the wallet recovery mnemonic, so you must manage backup on your own for this PK or risk losing funds for it at some points!
Can be safer to just set manually the fee on your base wallet, and send your coins with 1 or 2 sat fee then just wait.