To me at least, this does indeed raise a lot of red flags. I googled the company out of curiosity, and found a similar thread to your's on ResearchGate. In that thread, a person who claimed to be working for that company responded to the question. To cite part of her response:
Hello, I am working at Acavent and if you have any question, please
write to me. We organise events in EU countries. We have a big team
who are working in organising an event for you. At the same time we
cooperate with journals and reviewers. Please respect our work and if
something is wrong or you want to comment - firstly come to us. We
always try to provide the best service - from reviewing papers to
publishing at the journals. Acavent organises conferences for years
and the only time any event was cancelled, it was during COVID19.
Instead of onsite conference, it was held online.
A lot of that sounds like pretty generic wish-wash ("we cooperate with journals and reviewers"), and neither the level of English proficiency nor the request to contact them privately about concerns instead of seeking an open forum does inspire great confidence. While there is no guarantee that an event organized by a private for-profit company is predatory, my personal recommendation would be to avoid it, and attend more established events organized directly by researchers or research organizations.
