Hello. Does anyone know if there are options/steps that a US-based customer could take to trade across networks say
BTCB (BEP-20) or
Tether (BEP-20) on the Binance Smart Chain network (BSC) to
BTC (on BTC network),
ETH (on ETH network), or
USD FIAT?
I have been unable to find a DEX to do this either directly or indirectly
through a few steps of swapping different currencies/networks to get to one of above stated currencies/networks

I have tried doing this on
OKX wallet,
PanCakeSwap and
Trust Wallet to no avail
I am able to trade for
Tether (BSC) but from there don’t know what platform and steps to trade for BTC/BTC or USD FIAT.
Would someone please be so kind to tell me a DEX platform and the steps that can be done to do this?
OTHER OPTION:
If not,I think what might be another possibility is a VPN and then to use a trustworthy CEX with no KYC.
Anyone able to vouch for a what CEX could be done with this approach and the steps to follow?
THANK YOU so much in advance for your time and help, I am stressed and will be heartbroken if

I am unable to exchange my currencies with the option of cashing out for USD FIAT if needed
BACKGROUND:
Binance.us shutting down in my state, withdrawal of BTC did not work for me so I was forced to withdraw as BTC BEP-20 (BTCB)
I have BEP-20 BTCB and BNB in Coinbase and was able to transfer some out into Pancakeswap which I could switch to Tether BEP-20.
I researched the top 20 CEX platforms by market cap and NONE would allow me as a US customer to either set-up an account and/or trade BTCB/BSC for BTC/BTC or ETH or FIAT
https://coinmarketcap.com/rankings/exchanges/