Yes but that would send signs that the UK couldn't help but see like extra U-boats, proper landing craft, aircraft carriers etc.Is it plausible for the Axis to adopt a "Britain First" strategy?
Is it plausible that once they pick a course of action, they would understand its requirements set out to fulfill them (like expanding the logistics network in North Africa, building docks, railroads, etc.)?
They knew what was needed but didn't show any sign of being patient enough to do it and commit the economy in the scale that the UK did.
Is it plausible that they would be given the time to do it before other great powers intervene?
In wartime, no they wont be given the time, before war is declared, the other powers don't have to intervene, they just build up their forces in the area.