Gotcha. So Thunderbolt isn't necessary, but good for having multiple displays in one port.
From my understanding then, I don't need a pricey dock after all? I could just plug one monitor directly into the MBP via HDMI and get a cheaper hub and plug another monitor via HDMI, like one of these:
https://www.amazon.com/Satechi-USB-C-Go-Multiport-Adapter/dp/B08X1YVCZG
https://www.amazon.com/Satechi-USB-C-Hybrid-Multiport-Adapter/dp/B09JDSLYZS
https://www.amazon.com/UGREEN-MacBook-Thunderbolt-Delivery-Compatible/dp/B087TSQR6X
https://www.amazon.com/UGREEN-Multiport-Adapter-Ethernet-Delivery/dp/B093FKT9BF
One mirrored and one extended display