TBH if even 10% of the PUBM players get interested in Valorant, the viewership will exceed JP easily.
Also, if the league is streamed on television expect millions of people watching easily.
It really depends on how Riot markets the game here. They have put up huge billboards and attracted mainstream sports teams to start valorant teams in the past few months. Moreover, higher stakes and imports mean that other regions will also be watching SA valorant.
If something goes mainstream in India, it will easily break any record there is. If any cricket tycoon invests in Valorant, the viewership will easily exceed millions.
I genuinely don't think you should question SA viewership potential when literally 25% of the world lives here.