Compatibility

I have 2 servers, a PowerEdge M910 and a PowerEdge R610.

I know they are a bit old, I need to update the infrastructure of the company.

I have other more modern servers that do support version ESXi 7.0

But the M910 and R610 servers do not support ESXi version 7. (According to what this page says: https://www.dell.com/support/home/es-es/drivers/supportedos/poweredge-m910)

My query is;

Are they not fully compatible or is it not recommended to use this version on these servers?