No. There is no regulation that prevents a citizen from repairing themselves any kind of electronic device. The problem is that there is also no regulation that requires electronics companies to provide documentation or standardization of parts for the repair of these devices.
This means that your company (let's say a company making TVs) can obfuscate access to their device by using unique proprietary parts (that only they produce). This has been in discussions for years particularly due to some manufacturers doing planned obsolescence (which is worth its own analysis).
The EU proposal "right to repair" is following a world trend (the movement in US is even stronger) and it requires manufacturers to provide adequate conditions for third parties to repair the devices.
Currently this has been enshrined in EU law (which is positive) but somewhat watered down (see this article):
Everyday products including lighting, displays, washing machines,
dishwashers and fridges will need to be made to be more easily
repairable and longer-lasting from April 2021.
However, campaigners have criticised the new laws for limiting access
to most spare parts and repair manuals to professional repairers only.
This may restrict the access of independent repairers, repair cafés
and consumers to some key replacement parts and information, limiting
the availability and affordability of repair services, they said.
Campaigners blame strong pressure from industry lobby groups for
prompting the European Commission to water down proposals on
repairability in favour of recyclability.
This was not totally unexpected since the EU members with large industries were against the proposal (see this article):
The European Commission has put on the table proposals to make it
easier for consumers to have certain products repaired instead of
having to buy new ones. They would trigger substantial environmental
benefits by reducing waste and unleashing the potential of job
creation in the sector, according to Chloé Fayole from ECOS, co-leader
of the Coolproducts campaign, who attended the discussions. “At the
moment, consumers are forced to discard products, as repair is made
impossible or unaffordable.”
According to their statements during the meetings, Germany, Italy and
the UK are currently blocking the proposals, while France, Poland and
Spain are either completely disengaged or have adopted a neutral
stance. Because of the high weight their votes carry, the proposals
are likely to be dropped from the agenda if their positions are not