Thanks for flagging this one. I've looked into it and it seems this is correct as per the format for 2023 (4th edition).
For the group stage, the 28 teams were drawn into two groups of fourteen teams each, playing on a single round robin basis. Additionally, each team will play one interzonal match against its rival team in the other zone. In each group, the top four teams will advance to the quarter-finals. The final stages (quarter-finals, semi-finals and final) will be played on a single-legged basis.
However, looking at the save it seems River are in the same zone so this is something we will look into