Square holds payments, too. Same 120 day window, too, because that's how long Visa, Mastercard, and Amex give customers to initiate a chargeback.

https://www.eseller365.com/square-holding-funds-business-120...

> Like other payment processors, we periodically review your sales to assess the risk of payment disputes. In a recent review of your account, we determined that we have to hold a portion of your transfer in a reserve balance. Beginning <redacted>, 30% of each transaction on your Square account will be stored in your reserve balance, and will be released 120 days after the original transaction date.