The CirQ app is totally compatible with various third-party hardware accessories. visit the link and you’ll find a list of the accessories in detail.
In case you didn't know, CirQ is platform and device independent. So, it is mostly hardware accessories like printers that you would check for compatibility.
CirQ can do away with the need of any priner by using display instead of print. Otherwise CirQ connects to Receipt Printers of the types Ethernet and Bluetooth Printers. It also works with the most popular KOT printers.
Click above to read in detail on how to connect a printer to your device with the CirQ App.
Connect a supported printer to the CirQ app on your device. If you have any connectivity issues go through the step by step process mentioned above to troubleshoot.