Yes. When you use a regulated form of currency to deposit into your online gambling account or make withdrawals via the same, these will show up on your bank statement. Online casinos, sportsbooks, and US legal online poker sites may not explicitly include “gambling” or “betting” on these statements, but they will have some identifying characteristics for those who know what to look for. If you wish to avoid this, cryptocurrencies like Bitcoin, Ethereum, Litecoin, Cardano, Solana, etc. should be used for all online gambling transactions.