As suggested some time cisco missed to update the matrix since these devices are new one should support personally i think.
check below : ( also check with SE and Partner confirm before you buying)
I just patch DNA-C for Log4Shell but still no support for C1111X-8P
Last update for TAC:
I am looking at the case notes and I understand that you are unable to add the C1111-X-8P router to the DNAC since it says it’s not supported. I have checked internally and confirmed that this model of router is not currently supported in any DNAC version. According to some internal communication, Developers are planning to include this support in a future release, however it hasn’t been confirmed yet in which or an estimated date for it.
Hi @buhawi ,
What is the IOS version running on your C1111X-8P?
Additionally, is this the full part number? According to the Cisco DNA Center Compatibility Matrix there are C1111's that are supported, so we would need to verify that 1. the device model is on the matrix, 2. the IOS is on a supported version, and 3. that there are Cisco DNA Center Advantage licenses on the device.
We recommend comparing these items with the compatibility matrix linked below.
I have been able to confirm that C1111X-8P with IOS version 17.9.1 will be compatible with Cisco DNA Center Starting in version 126.96.36.199. While we do not have a release available for this version, it is showing up on the compatibility matrix for Cisco DNA Center version 188.8.131.52. Sadly it does not appear that IOS versions prior to 17.9.1 will be compatible.