Duration before a share is accepted

I've been running XMRig for almost 7 hours now uninterrupted. My average hashrate is 73 MH/s. However, no single share has been accepted yet. I've not seen any RVN in my wallet yet.

Could someone explain what the reason could be?

GPU: AMD RX 6600 8GB EAGLE
XMRig 6.17
Using 2Miners pool

P.S I'm a newbie here.