My tests show that you have to call resync then call get nft requiring 10 requests per NFT to get its specific updated metadata.
Also noticed this – Note: /nft/{address}/{token_id}/metadata/resync
has a billing cost of 5 and a rate limit cost of 25, meaning that you can call it only once per second with a free plan and twice a second with a Pro plan
I certainly am new to Moralis so if there is a better way, please let me know.