Welcome to inquisition.observer! On this site, you'll find every transaction made on the Bitcoin signet that spends a UTXO created using one of the deployed soft forks.
As of block 303901 there are:
SIGHASH_ANYPREVOUT (APO, BIP118)OP_CHECKTEMPLATEVERIFY (OP_CTV, BIP119)OP_CAT (BIP347)OP_CHECKSIGFROMSTACK (OP_CSFS, BIP348)OP_INTERNALKEY (OP_IKEY, BIP349)