90% or so of mods available are still for the UE/PE eds. of WOFF. The consolidated airfields mods by RJW and company, including other addons that go with that airfields mod, have been upgraded for BH2 - should be indicated somewhere in the info. next to the download links if they are BH2-compatible, since the older airfields mods that are for WOFF UE, also PE, are still available on that site too.
The only other mods that have been upgraded to BH2-compatibility so far, as far as I am aware, are the MissionEd, also the MultiMod, as well as the bombsights mod and tracer mods (these last four are all by JJJ). The interesting thing about the MultiMod is that older UE/PE-compatible versions also work well with BH2 (as in my case) - only thing to keep in mind is that if using an older ver. of the MultiMod, the OrbyxP "fuel consumption" mod entry, within the MultiMod, will be perpetually toggled to "on" if using it with BH2.
One other thing worth mentioning - some of the UE/PE-era mods work with BH2, such as 4L0M's improved clouds mods, that give 1 MB+ size clouds (since some stock clouds are less than 1 MB in size) - doesn't hurt to experiment since most of the mods are JSGME-friendly so they can easily be offloaded if not compatible.
Note: I often refer to BH&H2 as BH2 for simplicity's sake (merely stating this to avoid confusion in my posts).
Cheers all,
Von S