The correct answer is Joe Bidens's Vaccine Mandate for Private Employer's with over 100 employees does not exist. The vaccine mandate for Federal employees does exist and is listed in the Federal Register as: EO 14043:
Requiring Coronavirus Disease 2019 Vaccination for Federal Employees.
The funny thing about EO 14143 is that it says the order is effective except where it is unlawfull…lol
Should be 14043
Appears to be mostly about masks and protecting the federal workforce, and creating an agency that has the function of doing so. And…this: (ix) vaccine prioritization, distribution, and administration;