Saturdays to me are the busiest day now.Only really noticed this tonight on more buses on the app near me but there's definitely more buses full at this time on the 1s and 2s in particular although it's starting to occasionally happen on the 3 too. I definitely think the weather picking up and things opening up is causing it though. I've seen more complaints about buses being full too of late.
It's a shame that the government won't keep funding levels as they are if buses go back to full capacity because there's definitely a risk of losing more passengers the longer the buses aren't at full capacity. I'd imagine some services would do alright if capacity was normal but definitely nowhere near all just yet.