no HE-177. build the OTL number of FW-200s (approx. 250) and an equal number of JU-290s (instead of the handful built.) that would have been worthwhile to attack Allied shipping.
maybe a couple dozen BV-222s would have been useful..
instead of wasted efforts on the "mistel" concept a better developed version of the HE-111Z twin fuselage design might have actually worked.
Or 4800 more Bf109s. The Ju290 was twice as heavy as the He177. It was a converted transport. Basically it should have been used for Fritz-X attacks on Soviet industry/electrical infrastructure, rather than wasted in the Atlantic.
was trying to follow along with your scenario, 210 not ready continue producing a workable aircraft.
in the case of HE-177 bomber, never proceed with that just build the prewar designs FW-200 and a bit later JU-290 (not really sure an appropriate number, let's say build enough so the LW and KM aren't fighting over them?)
if Heinkel was determined to build a bomber why not a Z version of HE-111? using twin fuselages. could have even tried 3-engine version with the DB "power system" unit used on HE-177. (thinking about an extreme niche plane at most 100 not the 1,000 HE-177s built OTL)