But then when you move to Verizon you won't be able to use it since you won't need the modem because Fios provides the ONT that is a fiber functional equivalent to a modem.

So best get an inexpensive DOCSIS 3.1 modem like the Arris SB8200 modem to hold you over and get a nice router for the longer term, preferrably one which is WiFi 6 (AX).