Getting NFTs/Tokens from array of accounts?

My dapp shows all the nfts/tokens a user has (from all linked accounts). Is there a way to reduce API calls and pass a batch request to Moralis for an array of accounts instead of 1 at a time ?

And also is there a way to check an array of chainIds instead of 1 at a time as well ?

There isn’t that option now. You will have to make a request per account and per chain id.