If the Third Reich never got involved in North Africa would the resources freed up and made available for use on the Eastern Front been enough to allow them to defeat the USSR during Barbarossa in 1941 or during Case Blue in 1942?
On top of the points already made that the Afrika Corp aren't going to make much difference in terms of being added in to a Russian Campaign. It there's no Africa Corp it's likely Britain & Co beats Italy & Co in NA and NA becomes allied operating ground and that allows Britain and the allies some serous ways to mess with axis and occupied Southern Europe, likely effects Turkey being even more pro Allied than it was, and likely allows direct supply route to southern Russia with negative effects for that campaign (from a German perspective)
the NA campaign with no upside but great downside?
the BEST case for Axis would be if they could have fortified themselves in Libya, gained use of French Tunis port, and closed Med for transit without horrible (OTL) losses?