Can Orders Submitted Before 6:00 pm ET be filled after that?

I know that you can only submit an order in the aftermarket between 4 pm ET and 6 pm ET, but does anyone know if you can get filled after that time in the aftermarket, assuming you place the order before 6 pm?

For Example: The current time is 5:00 pm ET and I submit a (extended hours) limit buy order for AAPL at $140. If the price of AAPL goes down to $140 at 7 pm ET (after the period in which you can submit orders in Alpaca), will I get filled (assuming liquidity isn’t an issue)?