The general strategy of “1 inf blocking, retreating stack behind it threatening counterattack” is the basic building block of Russia’s defense against Germany.
The thing to keep in mind about 1940 Global is how ridiculously large the distance is from Germany to Russia. The closer Germany gets to Russia, the more dangerous the Russian counterattack becomes simply because Germany can’t replace lost units with any relative speed, even if they’re using transports to ferry troops to Leningrad.
Any chance to strike back with good enough odds to strip Germany of their infantry cover means by the time they get to Moscow they risk naked tanks and fighters against a large force of defending infantry. Having enough artillery within your counterattack forces will be key.
Just moving your forces back toward Moscow every turn and waiting for defeat will almost always get your capital sacked.