Combining ExpressRoute with VNet-to-VNet Connections

I want to establish a VNet-to-VNet connection to a VNet that is already connected to ExpressRoute.

Is this possible? My understanding is that it is not, because:

• A VNet-to-VNet connection requires a VNet Gateway of type VPN (not ExpressRoute)
• A VNet can only have one VNet Gateway [1]

If this is indeed not possible, are there any work-arounds? VNet Peering is not an option because the VNet-to-VNet connection is between an ARM and ASM VNet, and the VNets are in different subscriptions.

[1] Screenshot in support of the "only one gateway per VNet" statement: