Canon EOS support for focus during shutter control doesn't behave as expected.
Investigate how or whether it is possible to bring up to parity with the Fujifilm cameras.
Based on this discussion, we will need to implement the 'Remote' service handling to get focus support.
I do not have access to any newer EOS cameras, but I can guess what may work as a starting point.
Canon EOS support for focus during shutter control doesn't behave as expected. Investigate how or whether it is possible to bring up to parity with the Fujifilm cameras.