Maybe you have to try your self,

1. Open https://iancoleman.io/bip39/
2. Turn off your internet
3. on BIP39 Mnemonic enter your recovery mnemonic seed from coinomi wallet
4. on box coin select ethereum
5. scroll down on derivation path select bip 32 and choose coinomi, ledger



6. on Derived Addresses below you can see tab address, public key and private key

7. install trust wallet, then select smart chain, then private key

8. paste your private key which you send to the address.

for more here; https://coinomi.freshdesk.com/support/solutions/articles/29000037130-how-to-access-bep20-tokens