Drivers are available from the Pixma MG 6120 Support Page. However, for both macOS and Windows, it appears the drivers are not available for the newest operating systems (especially on macOS). So when visiting that page yourself, you may need to select an older operating system from the "Version" menu. That menu should default to the operating system you're currently using.
It may be the case where any drivers for an older operating system may still work.
I got a new computer with no CD drive and cannot use the printer since I cannot download the driver to my computer. I could send you my CD if it would help. Or you can download the driver online. It may cost a few dollars. Honestly, I have used the printer for years. I am not too happy with it at the moment because I need to send everything to my phone and print from my phone. But the printer won't stay connected to my Wifi so it is a hassle to use. As soon as I use the bulk of the ink I have, I think I am going to replace it.
07/31/2023: New firmware updates are available.
05/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
04/20/2023: New firmware version 1.4.1 is available for EOS R3
03/30/2023: New firmware updates are available.
2/07/2023: New product announcements!EOS R8 EOS R50RF-S55-210mm F5-7.1 IS STMRF24-50mm F4.5-6.3 IS STMRF15-30mm F4.5-6.3 IS STM