SRL was a limited time live event in destiny 1. All Live events for destiny 1 ended on release of destiny 2. Currently the only SRL is in private matches, so you would need to build your own match
There has been no changes to Destiny since July 2017 and Bungie dropped all support other than save data and matchmaking servers in August 2017. SRL is in private matches but in normal matchmaking well as I said Bungie dropped all support. In D2 players have asked for SRL but Bungie has said nothing at this time.