"For these programs, IRCC can only refuse or approve applications. This is why you have to submit everything at once, because the department may not be able to give you a second chance to send in a completed application. There may be situations where IRCC will request additional documents. There may also be a possibility to submit documents that are more difficult to obtain at a later date, such as police certificates, as long as you can prove you have made a reasonable effort to get them.
The documents required for the new programs will be published in the application guide.
IRCC says to look at the Canadian Experience Class application guide for hints."
"IRCC is currently trying to extend medicals as much as possible during COVID-19 for those in Canada.
For this group, they will be dividing people into
two groups: people who have never done medical and people who have done medical."
I assume some of these are legit if they got the info straight from IRCC. The second part is interesting as it might mean medical may not be necessary if you've done one before.