Since Bitcoin Core v30 the "datacarriersize is increased to 100,000 by default, which effectively uncaps the limit (as the maximum transaction size limit will be hit first)" https://bitcoincore.org/en/releases/30.0/

The default value in the previous Bitcoin Core version was 83 bytes, that is enough for monetary use cases, e.g. Peg-In transactions to the Liquid sidechain require an OP-RETRUN size of 36 bytes.