Hi,
My daughter mentioned that there is a scheme running for people with hidden disabilities. i had not heard of it before but people wearing a sunflower lanyard indicates they have a hidden disability. There is also one for "give me space" which is black and yellow
One benefit of the scheme is that retailers acknowledge that the person needs some assistance but also may be exempt from wearing a face shield.
Allegedly, it is supported by the UK major retailers.
If you are interested take a look hiddendisabilitiesstore.com/