@Nasrul A lot of modern home WiFi devices don’t include the option to make Static IP Address. A good example is WiFi bulbs. The “fashion” if you want to manage your IP addresses (which I think is a very good idea) is to do it in the router with a “DHCP Reservation Table”. This will create a permanent IP Address linked to the Ethernet TCP/IP MAC Address. See if you can configure your Router. If not post your Router model number and I can tell you how to do it.
Kind Regards
Kevin