ADA applies to many work injuries
FYI, many work injuries meet the threshold of substantially limiting a major life activity. A few states, such as CA, have a lower threshold of only limiting a major life activity
An injury does not need to be permanent or at MMI to qualify. ADA has covered temporary or episodic disabilities since 2008.
It is common for employers to attempt to push people out of the job by denying doable accommodations (or restrictions) and having them exhaust protected leave.
Generally, employees are expected to do essential duties with these accommodations and accommodations can’t cause an undue hardship. Undue hardship is actual hardship- not just inconvenience or an additional expense.
AskJan.org is a great resource about job accommodations
Here is guidance from the EEOC https://www.eeoc.gov/laws/guidance/enforcement-guidance-workers-compensation-and-ada
If you are having problems, talk to an employment attorney. Some people with industrial work accidents have a WC attorney and an employment attorney. Ideally they work together
Good luck!