Currently PPP tries to connect during some time, around 10 seconds
and then it gives up. After the timeout, PPP's serial traffic which looks
like !}!}!} }4}"}&} } } } }%}&y is no longer active at serial line and other
end (pppd linux) can't establish connection after timeout.

In application I would need PPP to continuously be active
because if I restart PPP by deleting its instance and creating again
after ESP32 has connected to WiFi, then PPP will spoil WiFi routing
and I don't want this to happen.

Additionaly - is this bug? This won't manually restart PPP after timeout:

ppp.active(False)
ppp.active(True)

Does nothing, while I think it should reactivate PPP traffic to
attempt connection on serial line, the chars !}!}!} }4}"}&} } } } }%}&y
should appear again