Any way of transferring to a Panama bank account that uses a US bank to route. Being asked for address of beneficiary but no option to give a Panama address .
You cannot send money to Panama. This is described in FAQ:
https://www.revolut.com/pl/help/exploring-revolut/spending-and-sending-money/sending-money-to-a-bank-account/where-can-i-transfer-money?lang=en
The article does not exactly answer but will assume in any case that USD accounts in Panama are not supported.
The article states that Panamanian Balboa is not supported.
Unfortunately you cannot make a transfer to Panama.
FAQ says:
We currently do not support transfers to the following countries:
AFG, AGO, BIH, BDI, BFA, COD, CAF, COG, CIV, DZA, EGY, ERI, GIN, GNB, GUY, HTI, IRQ, IRN, KHM, PRK, LAO, LBN, LBY, NGA, PAN, PSE, PAK, SDN, SLE, SOM, SSD, SYR, TJK, TLS, TUN, UGA, VUT, VEN, YEM, ZWE, CUB, LBR, MOZ, BLR, MMR, and SWZ.
For me it is perfectly clear.
It is perfectly clear if you are NOT aware of or consider the role of correspondent banks in international money transfers. Think Google could help one there.
Perhaps a statement “***transfers through correspondent banks in supported to unsupported countries is not or ever will be supporte***d”
would make it clearer to those familiar.
IMHO if you want to send money to unsupported country, the path doesn’t matter. This particular country is still forbidden 
Of course you can still send money from Revolut somewhere where sending money to Panama will be available.