to add to Ariadne’s comments:
Neuropathy has different degrees. Some people even have to wear braces and need to use a walker because of complete lack of sensation in the feet. Others may only have slightly diminished sensations. In a group fitness setting, I would recommend mainly seated exercises or something where a chair is nearby for balance. It is also prudent not to make sudden directional changes. For hands, the lack of feeling often makes it difficult to hold something securely. To make sure that the person cannot hurt himself by dropping a weight I would use elastic resistance which can also easily be secured to hands without the need to hold it tightly.
The same precautions apply to home exercises.
You may not be familiar with the MELT Method. There is a Hand and Foot Treatment kit for self-treatment of the fascia. I have seen good results when using it with clients with neuropathies. On the feet, it improves sensation and thus balance, and the equivalent for the hands.