This is great news but it is just a start. I have some worries about keeping products safe and adhering to agency approvals. And I do wonder though whether you want to allow uncertified technicians to work on dangerous machinery like farming equipment. A hydraulic leak can lead to super nasty injuries which are not immediately obvious to doctors.
In sane countries cars are subject to mandatory technical inspections which I think are a good thing for safety reasons. In the NL there is a law nowadays that says only certified technicians may work on gas heating systems. There have been too many accidents with carbon monoxide due to poorly installed heating systems.
IOW: right to repair requires the government to step in and make sure public safety isn't affected.
How many combines versus how many automobiles? At least in California, the only mandatory automotive inspection is for smog and it is done every 2 years and never for EVs. Other states have different rules but California is a pretty populous state. The inspection is required to renew the registration so you won't get a license plate year tag without the inspection.
There is also nothing preventing DIY auto repair. You just need to pass the smog test every 2 years. No particular qualifications required. The smog inspection process is HIGHLY regulated.
There are thousands of stores selling remanufactured parts and some brands of factory parts. New factory parts can be purchased through dealers.