Are there any exchanges that don't require photo ID, or other personal info, if no fiat currency is involved?
Only crypto in and out.
Don't trust decentralized exchange especially if you are dealing with bitcoin.
Believed me they are more prone to fraud because it was anonymous. Id rather face the fees of a legit exchange rather than using a bitcoin decentralized exchange. While bitcoin price is increasing don't expect too much anonymity when dealing on exchange.