Well, you can sneak attack with virtually anything so long as the basic requirements for sneak attack are met. You can sneak attack with a glowing weapon with the Light cantrip applied to it. Being Bright and clearly visible to an enemy has never disqualified a rogue from applying sneak attack, either in BG3 or in the table top version. (Sorry if you were making a joke or something and it just went over my head 😅)
