[iOS] Signature and Logo Print issue

[akshay-simform]

I'm trying to print logo and Signature in receipt. In Android, It works proper but in iOS it not works as expected like in iOS, only text is going to print but signature and logo can't whereas in Android all the things work fine.

So, In case of any suggestion and improvement, let me know further.

Printer Description will be same as follow link.one can go through it for more info about the thermal printer: https://amzn.in/d/0C6J9Fa

Note: I've tried to execute the library example as well but sill I'm facing same issue in iOS bot it work fine in android.