My suggestion is to add the Macaw's mods (Doors and Windows, Roofs, Bridges, etc.) to the default modpack for Pixelmon with the upcoming 1.16 release.
The issue is if we have them at the client-side, it's on server operators to guide players/end-users to adding it, which often proves challenging.
Why should they be added?
1) They're compatible with 1.16
2) They're compatible with BYG
3) They're awesome. Seriously. Adding roofs, beautiful doors, neat things like gutters (!!!), etc allows for much more beautiful builds.
4) Again, adding them to the default pack would take a lot of work off server operators' shoulders.
A full list of them can be found here, although they are also available via curseforge etc.