Byet and Epizy nameservers are the same, but seen that some domain registrars add in front of ns1.epizy.com and ns2.epizy.com .namesilo.com, it will not work because it doesn’t exist as a registered nameserver.
You were getting DNS_PROBE_FINISHED_NXDOMAIN because the domain registrar added in front of ns1.epizy.com and ns2.epizy.com .namesilo.com, and seen that they don’t both exist, they couldn’t serve your domain. You could fix this by changing the nameservers to the byet.org ones (ns1.byet.org, ns2.byet.org, ns3.byet.org, ns4.byet.org and ns5.byet.org), seen that byet.org is registered by a valid registrar and has valid NS records.