LTE technology increases the ping such as In Fortnite or CS: GO because it's completely wireless? LG
Of course the ping is higher than with Lan. But in contrast to the Wi-Fi you will notice little difference.
I use a Netgear LTE router, but it is connected with a LAN cable. Will the ping be increased anyway?
In comparison with fiber optics, clearly yes.
Since the router (I think) is operated via a SIM and a tariff and not via a telephone connection. The data is still transmitted via radio (unless the router is connected to the network "again" via a telephone connection). The ping should still be around 30 - 40, so gaming is good.