I agree the pressure measured is low. However if it is constant, it does not show anything untoward, except maybe a faulty pressure reading.
Normally there is a given pressure, and a maximum deviation of say 15% between the highest and the lowest reading.
We don't know how you did the measurements. If you crank until the needle does not rise anymore, on all cylinders, then you have a pretty good comparative figure between each cylinder.
A head gasket failure need not necessarily register in such a measurement, as the compression pressure is maybe 10% or less of the combustion pressure (a guess!) and the temperatures are far lower, meaning that the leak, if any, might not even come into play!
The other question that remains, why are all the measurements this time the same? where previously they were all lower on the one bank, and what has changed, the instrument used, the method used, the operator or the condition of the engine?.
It seem as if whatever we do, repeatability is the one missing feature, and that leaves us all guessing.
That makes all efforts largely a waste of time.