ESA to U/C migration

Hi
I am due to migrate from ESA support group to universal credit by the end of June I have read other posts on here that say folk who are in the support group should migrate over smoothly without providing sick notes which is great

I have a disabled partner who has been part of my ESA claim for several years they have never taken any work capability assessment

Am I correct in thinking when they apply for universal credit and link their claim to mine and provide sick/fit notes when required this will exempt them from any work search commitments until they get called up for a WCA after completing a UC50 application form

neither of us have ever claimed DLA PIP or carers allowance

I have called the citizens advice help to claim migration call centre but the advisor didn't know and there was also a bit of a language barrier

Any advice or help will be appreciated

Thanks for the reply David.

Can you tell me if the DWP send out a UC50 application form as soon as the claim for universal credit is made and a sick note is submitted or is it the clamants responsibility to obtain the UC50 complete the questionnaire and send it to them

Thanks again for your reply David

If further down the line my partner chose not to go through with the filling in of the UC50 form and closed their side of the universal credit claim how would this effect my claim?

would it for example trigger a WCA as a change of circumstance or would my claim be closed also? meaning I would have to start the journey to LCWRA/support group all over again?
Thanks
Rik