Has a lease reverted to Duchy of Lancaster estate?

I’m in the process of selling my house and my freehold is subject to a lease that I do not own (MAN203408) the company on the lease’s title deed was dissolved in 2020. When I contacted the crown’s bona vacantia team they said it is within the jurisdiction of the Duchy of Lancaster. I’ve contacted them, but no reply. Is there any other way to check if it has reverted to them?

Emily, no you'll need to pursue it with your point of contact

Thanks for the quick reply Adam, I’ll chase them up again.