Welcome...
Short answer with the proper design it is plausible to place a suspended wood floor in the format suggested....They may not last long...but it can be done...
What I will also share, as a traditional/natural builder, is that EB is a "new concept" in architecture as many of them are being built. I think there are much better modalities of architecture in the "natural building" realm that are much better to build with...
This is not to say that I don't feel there is good promise for the EB system, just like other earth based systems. EB structures have been around for a very, very long time as a military embattlement, strengthening for resistant against rising water, etc. This does indicate the strength that EB has, but in all its original permutations, it is only used for "transient" structures and not permanent.
I do understand and agree with its current..."original"...intent as a "new system" of building as it was "reinvented" into...and that as a quick and relatively easy way to build homes for disaster relief areas, and/or in areas with extremely limited natural resources to build with. Of course the bags themselves and other material like plaster and barbwire have to be imported to make the system work, but when all there is in a dessert but sand...things are typically shipped in. This brings me to the next element, outside desert and/or arid environments, there is "good questions" about long term durability about this building system, as none are older than about 25 years yet, and we have already seen challenges with them in less arid regions.
So, all in all, I think the concept has some strong abilities and that a raised wood floor will possibly work. I would ask if this is the best natural building system for the architecture in question and its building environment compared to other perhaps more germane vernacular or proven modalities. To build with a system because of experimentation is understandable, however, to build with a system that is this "new" when there may be more or older traditional systems with proven track records, I question the application.
I own that part of my view may be subjective, and as a timber framer I would prefer that over stick built architecture, but I think in many applications I would always build a modified wood wall truss system which follows a "stick built" format over most of the EB structures I have encountered outside of desert and/or dry regions...
Just my two cents...