We know that 1.c4 paractically cant escape the QGD after the move 1...e6. (they can if they really want

)
Can the same move order be used by the QGA player ?
Lets see : 1. c4 e6 2. Nc3/ (Nf3 ) d5 3. d4 dxc4 4. Nf3/ (Nc3)
Rizzitano in his book mentions that QGA can be reached through other moveorders. Hen mentions only
1. Nf3 d5 2.d4 Nf6 3. c4 dxc4
1. Nf3 d5 2.c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. d4 c5
From line 2 above one should just start with the move 1.c4 ? Is it so simple ? Is there any catch to be aware of as a QGA player when facing 1.c4 ?
In Rizzitanos examples we can not find any move with an early Nc3.
Do any QGA player here play 1..e6 against 1.c4 going for QGA standard positions ?
It would be very practical/economical to have this route against the 1. c4 player. Perhaps there could be a greater risk to for black to face the Catalan If I invite to QGA ?
Do QGA players normally "fish for QGA" with 1...e6 against 1.c4 or do they normally go for two separate defences ?
Regards