Ad Networks

No	Ad Network
1	AbMob
2	Meta Audience Network
3	AppLovin Max
4	Start.io
5	Unity ads
6	ironSource
7	Wortise
8	Yandex

Especially for Audience Network, Audience Network will only use bidding for Android apps starting September 30, 2021. So, you need to setup for Bidding with Partner Mediation. If you choose to use Audience Network Bidding, please select Ad Network Type to be AdMob or IronSource These Ad Networks support being a Mediation Partner although it's still a Beta version.