What can a DWP work coach do?

I had an appointment last Wednesday with my work coach as I have been deemed fit for work by the WCA assessment people, I have appealed and its going to tribunal, I have been off from work for the past 3 years with fibromyalgia, chronic fatigue syndrome, osteoarthritis in my hips spine and feet and also suffer from contact dermatitis, plantar fasciitis, asthma and carpal tunnel. I am on standard daily care allowance for PIP and for the last 2 years I have been contacting my employer to try and sort things out so that I can either go bak to work in another position/part time or be re-trained to do something else. Covid got in the way for the last 2 years and with all the furlough etc etc, my Employer has only now decided to look into this for me.

Anyway, I saw the work coach and explained my situation to which he was very offhand about as he kept saying that how could I have so much wrong with me as I am younger than him and should be able to work. He also kept commenting that I wouldn't be able to stay on benefits for that long and that I WILL have to find work one way or another. He also said that if I didn't get things sorted with my wmployer that he would write me up in a Report and have my benefit stopped as I am clearly fit for work as he saw it and also that if I didn't sort it out with my employer, he would side step them and find me another job himself. Can a work coach act or behave like this?
It's almost as if he had a complete disregard for any of my illnesses or problems and forcing me to find work as he said my employer was dragging their feet and according to their phone assessment I am capable.
Anyone's thoughts on this would be appreciated. I have shortened this down as there was more things he had said and commented to me that were very demeaning and disrespectful.