The funerary stone that Brasso carries has the following text written on it in Bazeese script: Maarva Andor and the dates 7895.330.9-7972.216.4. In an earlier scene, Cassian touches his adopted father's funerary stone, which reads Clem Andor, 7896.39.5-7959.318.3.
An imperial vessel of the same type as the one hijacked and given the eponymous call sign Rogue One in the events of Rogue One: A Star Wars Story (2016) can be seen at the beginning of the episode alongside Dedra's landing imperial shuttle.
Mon Mothma mentions Canto Bight to her husband, the casino city introduced in Star Wars: Episode VIII - The Last Jedi (2017).
When Cassian is leaving the shipyard after dropping off Bix you could see a VCX-100 Light Freighter the same model ship as The Ghost from Star Wars Rebels