Despite having played enough battlegrounds rounds to complete the relevant seasonal triumphs, the tier 2 and tier 3 focus options for rocket launcher and SMG remain locked (the required prismatic lenses don't drop). I've searched various forums and learnt that a lot of users are facing this issue, despite the 02/25 TWAB claiming to have fixed this problem. I don't know if it has something to do with the issue but I am a returning player and did not have all past season pass levels unlocked; I have not seen a single "Brass Attacks" sidearm drop so far in any activity. Some fixes suggest claiming a seasonal triumph or getting more kills with the said weapon to refresh the kill counter, but I can confirm that none of those work.