Brittany Mahomes' Sports Illustrated Swimsuit debut might just be the beginning ... 'cause two big-time models tell TMZ Sports the Kansas City Chiefs superstar's wife could use the opportunity to launch a modeling career!!
Camille Kostek -- who graced the popular magazine's cover in 2019 -- said she's always loved how women use the platform to showcase themselves to the world ... and that's something Brittany can do now, too.
Despite being in the S.