Yes but that comes down to the definition of MTOM for standard units. Prop guards aren't standard payload for the Mavic drones, as I said they aren't designed to be flown with a payload. Prop guards are mainly used for indoor flying where these rules don't apply.Its easy to arrive at that conclusion.
Currently sub 250g drones can fly in the A1 as their weight is classed as flying weight. A new C class drone is based on MTOM. So, if the mini 3, for example is released with a C0 rating it will need to be sub 250g MTOM which means it cannot have a MTOM greater then 250g which currently on the Mavic mini 2 it does becasue it can carry prop guards for example which take it over 250g MTOM. Thats why I suspect the mini 3 could be a C1 as the MTOM is going to be greater than 250g.
Obviously that’s still in A1 but with no intentional overflight of people
This is stated on the CAP2012 from the CAA. It’s the main difference that’s is being overlooked between legacy drones and C marked drones.
It's up to the manufacturer to specify the MTOM based on the standard equipment. You can also strap a go-pro to your DJI mini, but that's not the standard drone that's sold.
Watch the video posted above, which is pretty clear about this issue.