Minor updates for android and IOS Web App

I have a web app on both android and IOS and I would like to make few minor updates.

The web app is loading a Drupal website inside of it but has some native functionality like barcode scanner, bluetooth printing, push notifications, ...

The minor update are as follow:
_ The app is connected to a thermal printer via Bluetooth and it will print data (Image, Text, QR Code) sent to the app using url technology.
Minor Update: I want to increase the size of the printed QR Code to 30mm.

_ The app is generating a token for push notifications every time the app is loaded and that generated token is appended to a url so the web developer can take it and save it for later use.
Minor Update: I want to the url where the 'token' is appended.

_ The data to be printed is sent via url to the app along with the printer IP Address.
Minor Updates: The app is not reading all IP Address of other printers and I want to fix that.

The app source code will be provided after signing a NDA Agreement.

Thank you,