Tested on Space Age 2.0.28.

Same happens with deconstruction planner, upgrade planner.

Also no grid is visible in the remote view. Grid does show up in remote view if the option "Show chunk on cursor buildable only" is disabled, but it still doesn't work with blueprints.

Short answer:
Update 2.0.2 has provided (partial) support to blueprint record (which is taken from library directly) in cursor. Please check it out.
If you are placing a REAL blueprint item (which takes up 1 slot in inventory), it should work even if in older versions.

Long answer:
I guess you are not holding a blueprint item, but a blueprint record (directly from blueprint library).
The most noticeable difference is the former occupies a inventory slot in character backpack, but the later takes a toolbar slot only.
Both are called "blueprint", but these two things are actually handled quite differently in game...
This was actually a problem since day 1 of this mod. (Which was at game version 1.1.x.)

By 1.1 game API, blueprint record is not accessible at all, not to say reading contents inside. There was no real way to know if it is a blueprint or an empty stack. So skipping that was the only way.

I have just checked 2.0 game API, it has the new cursor_record in LuaPlayer prototype. This allows accessing when a blueprint record is held in cursor, so I can finally put this to the support list.
However, it has a very complicated structure, where I cannot find an easy way to see the current selected blueprint if it is actually a blueprint book...
So now I have applied only "partial" support to blueprint record, in the sense that it is a blueprint but not blueprint book (yet).

I do not have special code regarding deconstruction planner and upgrade planner, so currently they are treated as regular items. I may look into how to reorganize the whole set of options in a better way.

I do not (yet) own Space Age DLC, so I cannot tell whether it will work in Remote view or not. But I guess in Remote view, items are treated as ghosts or blueprint records. This update 2.0.2 may have solved if the cursor is a blueprint record.

Thank you for the update!

Yes, the blueprints I was referring to were the blueprint records activated from the Blueprint Library or Quick Bars. Now those work fine with this mod, both normally and with the remote view.

If the reasons for not owning the DLC are financial, I'd be happy to gift you the DLC.

Glad to hear the problem solved.

Aha, no. :-) The base game and DLC come really low in price, especially when considering such a fun game that can easily sink hundreds ore even thousands of hours into it! Factorio is definitely worth the money!

The main reason for not purchasing DLC yet is the play time issue. In these months, I have spent >95% of my Factorio time with modding, with <5% with playing.
I want to finish a Nauvis-only playthrough once first, from pickaxing coal to launching satellites, to enjoy an 1.1-like original gameplay experience.
I want to play on Ribbon world map preset (actually modified to width of 448, span of two radars). I don't have real time to play with it since its introduction (in 1.1.x?) I believe this advance-or-die scenario would be both challenging and fun with my mod set. After fixing a few mod issues and adding some long-waited features, I will have a real start with the above-mentioned playthrough.
Only after that, I will obtain the DLC and play with all the new contents. Building spaceships (platforms) is a particularly attractive feature to me. I guess I will have real fun with that.

As said above, the DLC is totally affordable to me. Nevertheless, if anyone want to show some love and support to me, by tipping on Ko-fi or gifting a copy of DLC, of course I would not reject so. ;-)

I still have this issue - trying to place down blueprint from a book does not show the grid
https://prnt.sc/LWreaHVwVeU4