Daily Valorant is notan official Riot channel.
As much as it may seem odd that theyre not posting GC - in the end, the goal is to post the games they think will rack up the highest views (and therefore the most money). Its a business and a source of income. It takes time too - theyre sitting through entire games, finding clips, editing them together - yes, low effort, but time consuming.
Their goal isnt to showcase the games, its just the money that comes from it.
Ex:
GXR india was a big viewership thing. It had franchised teams, huge names (heretics, GE, PRX, Bleed, TS, RRQ, Enigma, etc....)
Covering that is bound to make money from Indian/APAC viewers on youtube.
GC is a low viewership - and therefore low income cover.
Small fanbases divided between regions who arent even guaranteed to watch matches from other regions.
From a money standpoint, it only makes sense to cover the big names Indian tournament versus the lower viewership GC tourney.
I doubt the channel is sexist. Im confident its purely "This will make more money so i will do this instead"
Of course the channel wouldnt want to spend hours pouring through GC games for clips, ESPECIALLY since they know it wont do as well as a video of the GXR India tournament.