Or, it could be that the shield was removed. (Though, why not just slap a Business banner on the existing one?) The '"Business" banners on US 87 shields through town' should not be discounted.
Every other source I've seen corroborates construction on the bypass itself finishing in August...
Construction on the northern portion was completed in August 2020.
According to Tanya Brown, with the Public Information Office for the TxDOT Abilene District, the new US 87 Truck Relief Route is 32 lane miles. It runs from IH-20 to North US 87. She stated that the north portion starts North of the FM 700 and US87 intersection and meets the South portion at IH-20.
Brown advised that the Southern portion is also complete. You can now go from North of Big Spring to South of Big Spring. TxDOT is currently working on a bridge that will connect US 87 with FM 700. She advised that There is some minor work to be done on the North section that will be accomplished with day time lane closures.
This bridge is still listed on the TXDOT Project Tracker, while the bypass itself is not.
I believe that's what we see in formulanone's 2nd photo -- construction on the FM700 / US87Bus interchange. It's related to the overall project, but not directly on the relief route itself. Note how
TO SOUTH 87 <-- is signed, not covered. This directs traffic along the last little piece of FM700, and then onto the bypass.
The first photo is indeed odd; I gotta conclude the main lanes of the bypass itself were open, but the interchange ramps were not. A red herring.
I'm not convinced that the Big Spring relief route is not open to traffic now, or even that it wasn't when the photos were taken.