AirPrint works with wireless (Wi-Fi) or wired (Ethernet) network connections. This means that one can choose to connect an AirPrint-supported printer either wirelessly or to one of the LAN ports of a Wi-Fi router. You will find a list of AirPrint printer models here:
About AirPrint - Apple Support
However, since your Ricoh laser printer is an older model, it may not support AirPrint. If so, if you wish to print from an iPad or iPhone:
a) If you have access to a Mac computer running OS X 10.9 Mavericks or newer (with printer drivers for the Ricoh), you could use a third-party Mac app such as Printopia in order to make that computer a print server with AirPrint-like capabilities. At least earlier, there were similar solutions for Windows PCs, but I do not have any information about the present situation.
b) You could also try a standalone print server with AirPrint-like capabilities. For example, the little Raspberry Pi device described by Techguyuk in Can’t print with iPadOS17 - Apple Community could perhaps be worth testing. The idea here is to use a Linux print server as an intermediary, thus allowing an iPhone/iPad to see a normally unsupported (USB) printer as an AirPrint device on a network.