You absolutely can, but trademarks need to be domain-specific. And the social media platform and the window system don’t have much overlap in their respective domains.
Another window system couldn’t come along and call itself “X”, but a microwave manufacturer very well might be able to.
It’s more likely to be down to incompetence. I can’t imagine the party UV lights are more expensive than the fuck-you-up UV lights.
EDIT: Someone else mentioned these might’ve been used during COVID for sanitation, and are extremely cheap leftover wares now that the pandemic is “over”, which would actually make them a lot cheaper.