I'm really surprised as well, as several of those leagues do not allow sportsbooks to use their logos, especially the MLB, which has had several betting scandal

I'm really surprised as well, as several of those leagues do not allow sportsbooks to use their logos, especially the MLB, which has had several betting scandals in the past. The NFL also do not grant license requests to use its logo to sportsbook; only certain business partners (and their subsidiaries) may use the NFL logo in association with a sportsbook offering.