At the very least, it would be extremely courteous to ask permission first, explaining that you don’t mean to market it for financial reasons, just to enrich an enthusiastic, growing flight sim community.
That said, I’m not sure who you would speak to about that. If the company were Airbus, for example, they have numerous Media Relations contacts for different regions. Other manufacturers will likely have the same.
Be aware they may not even know of the existence of this simulator. 