Yes I did think about a g2 assault, but not sure if you want USA in war that soon.
Regarding the transport protection mentioned earlier for a g3: Leave the Battleship in sz 113, with 3 fighters scrambled, I don’t care what can hit it on turn 3.
Back to G2 Sealion. Here is my thought, hit sz 110 and 111, send 3 subs at sz 109 that leaves 1 sub for 110 and 1 sub for 111 or 112. Hit 112 with BB and CA. Build transports in sz 113 you will want the 10 air units 6 on 110, 4 on 111, and maybe the bomber on 109 see below or put it on 110.
If you clear sz 109,110,111,112. UK must use 91 cruiser to either block naval bombards in 110, or they must sink the BB,CA(if CA lives) in 112 with air and block using the CA in 112.
Itally can get 3 air on 112 to clear the CA. If uk loses planes hitting the CA and BB, turn 2 they fall.
If UK moves ca to 110 to prevent bombardment, Italy hits 110 and clears, if UK scrambles, Italy removes 1 or 2 UK fighters…UK likely falls.
With 3 subs on 109, technically you clear the DD as any hits must be applied there first. If you throw a bomber at that you have 3 sub casualties and might get a round 2, potentially clearing 2 UK air units if they want the DD to live, Italy can still clear a CA,DD in 112, but you have to defend Denmark from a UK landing. Italy can still attack a DD, CA in 110 but that gets ugly and you may not want to use Italy against the UK.
With 5 transports able to hit, UK must defend UK if you lose the BB and CA and don’t like the layout and scrap Sea Lion, you now have 5 transports to use on Russia G2.
Bad thing about G2 assault, unless you build an air base on Holland on G2, and even then, the UK might have assets enough in sz92 to scuttle the German navy in 110 losing 15 transports. Edit: its only 5 lol ignore the bottom part:
The only way to block that is to have Italy land 6 units in Spain 4-5 units on S. France, (Germany would have had to take S. France with armor and mech) and permit the German armor in S. France to seize Gibraltar thus trapping the UK fleet in the Med. (This likely leaves France or Normandy: very bad if extra air makes it to London) Edit: Germany would have to take Normandy with Mech and Armor. These armor then drive south to capture Gibraltar. This then gives you a weak thrust to take Sweden, if you drop artillery from Germany in Norway turn 1 non combat. Not saying a neutral crush is ideal, but it could save 15 transports. It is probably better to lose the transports.
Better plan would be seize Normandy turn 1, build 2 air bases: Holland and Normandy, and then you might save the transports, with a BB, CA, and 6 air units to cover (hopefully) after you seize London.