chrony startup marks all sources as falseticker

In short, I believe this is because you have two pairs of time servers at the same Stratum. If the two servers at the same Stratum differ in the time they report, chronyd will not be able to determine which one of them is the correct time source.

To get around this, you could add more time sources/servers to give chronyd a better chance of figuring out the "correct" time.

Alternatively, you could tell chronyd to "trust" one server from each of the pairs. This will allow it to simply 'assume' one of the servers is reporting the correct time and it will sync without defining them as false tickers. i.e. in your configuration definition you would do:

server 199.182.221.110 trust
server 206.75.147.25
server 192.168.63.114 trust
server 192.168.63.121

See answer and references here:

Both my ntp servers are marked as falsetickers in the status

Can ntpd/chronyd be used with two NTP servers, specifying one as primary and another as backup?