I hope you are well today and thank you for your questions.
I could confirm the same issue on my test site and it seems the contact form doesn’t work in the Unyson plugin accordion.
It is two plugins issue so we can’t do anything in it.
May be you can resolve this issue by developing some custom code but developing custom code for custom functionality is beyond the scope of support that we provide here.
If you are not a developer then you can consider hiring a developer to develop it for you. You can hire a developer from any freelance site. Shufflehound recommends the developer https://www.upwork.com/freelancers/~011652ffec8865c6d5