For each of your accounts, you have a specific address for each blockchain supported by XDEFI Wallet.
To view your address for that blockchain, simply click on the Receive button from the home screen then choose the blockchain you want, or click on the three dots associated to an asset on the home screen to be able to copy your address.
Note that your 
Avalanche, 
Polygon, 
Fantom ,
Arbitrum and Binance Smart Chain (BSC)
blockchain addresses are identical to your Ethereum
one (same addresses but different networks !)
Avalanche, Polygon, Fantom , Arbitrum and Binance Smart Chain (BSC) blockchain addresses are identical to your Ethereum one (same addresses but different networks !)