How to set up STAR Ethernet to iOS

I want to connect with Sam4s GIANT-100D (Ethernet, USB) printer.

I connected printer and iPad with ehternet with Sam4s app.
 

However, you cannot search for printers in the loyverse app. Why not?
 

I tried the pos on bluestacks and printer works really good if you connect it directly to router. But, what if the router is too far from the cash register and you need to connect printer through the PC ethernet port, would it be possible?
Did anybody try this?
Thank u all

So i just bought my Xprinter XP-58IIH recently. Although i read some topics here that Loyvese is not supporting this printer however this works perfectly with some of the videos that i watched. 
Whenever I am choosing Other Model in the Printer model option it always includes (Ethernet) and i don't have any other option to choose like USB or Bluetooth. I am using iPhone 11 Pro Max with iOS 14.2.
Meanwhile with my husbands mobile which is an Android phone if we choose Other Model in the printer, the interface has the option for Ethernet, Bluetooth & USB. 
So, i am thinking that this isn't the issue between the Xprinter that i have and loyverse, but its loyverse and iOS devices. 
 
*Note: I tried using the same iphone and xprinter with Xlabel the bluetooth device is connecting and is working properly. I hope this issue with ios user will be fix soon.
 
Hope you could help me in this problem. I attached some photos for your reference as well. 

Is my SM-T300i mobile bluetooth printer compatible with Loyverse on my IOS device?

I have a bluetooth printer that cannot be connected on iOS. I can only think of 2 solutions. First is to connect the printer directly to iPad via OTG cable. Second is to connect USB printer to AirPrint server and point iPad to it. Can anyone advise on this? I really need help on this!! :(