If it's the same A12 + (pseudo) 3 GB DRAM setup as in the XR, then it's NOT a true 3 GB DRAM device !
Specifically, the XR does NOT act like a true 3 GB DRAM device ! ... that has been proven !
However, many won't notice the issue since neither the new 10.5" Air or 7.9" mini include a 12 Mpx image sensor ... specifically here, for those who don't know, a sufficient amount of DRAM is required when capturing Full-Res 12 Mpx photos ... this is where most will notice the Diff between 2 GB vs 3 GB vs 4 GB.
Both of the new iPads include the same set of cameras, 8 Mpx on the Back, & 7 Mpx on the Front ... so, 3 GB is ok with both.
I believe AAPL learned from their XR mistake.
The XR would have been fine with 4 GB of DRAM, but is a Dog / Performance Lemon with it's current (pseudo) 3 GB DRAM setup.
Few in the General Public know this.