It's on the side menu, top of the list. I'm not sure how you're missing it TBH.
Well, it's not in the side menu if you didn't toggle the 'All Play Modes' switch on the home screen before hitting play, so it's certainly missable, but I suggested that before, so...
When you enable the 'all play modes' switch and then hit the play button, the side menu should include the competitive modes. As far as I see, there is just no more panel on the home screen at the moment.
Still works fine for me too btw.
W(W/U)U Ephara - Flash & Taxes W(W/U)U || B(B/G)G Meren - Circle of Life B(B/G)G
RGW Marath - Ever shifting Wilds RGW || (U/R)C(W/B) Breya - Artificial Dominion (U/R)C(W/B)
UBR Becket Brass - take what you can, give nothing back UBR
W(W/U)U Ephara - Flash & Taxes W(W/U)U || B(B/G)G Meren - Circle of Life B(B/G)G
RGW Marath - Ever shifting Wilds RGW || (U/R)C(W/B) Breya - Artificial Dominion (U/R)C(W/B)
UBR Becket Brass - take what you can, give nothing back UBR
W(W/U)U Ephara - Flash & Taxes W(W/U)U || B(B/G)G Meren - Circle of Life B(B/G)G
RGW Marath - Ever shifting Wilds RGW || (U/R)C(W/B) Breya - Artificial Dominion (U/R)C(W/B)
UBR Becket Brass - take what you can, give nothing back UBR
W(W/U)U Ephara - Flash & Taxes W(W/U)U || B(B/G)G Meren - Circle of Life B(B/G)G
RGW Marath - Ever shifting Wilds RGW || (U/R)C(W/B) Breya - Artificial Dominion (U/R)C(W/B)
UBR Becket Brass - take what you can, give nothing back UBR