Cerebral Palsy affects every individual differently that is why it is difficult to create a one size fits all guidance about the impairment and coronavirus.
If you have respiratory issues, like getting chest infections quite a lot. Or are invited to have the yearly flu jab, you have swallowing difficulties normally, as some people with CP do, due little to no mobility, then you will be classed as having an underlying health condition. It is not the CP itself.
If you are still worried please contact your G.P. or 111