Your lift pump is mechanical and after the filter (green).
So that's not the issue of the filter filling.
If your not getting fuel to fill the filter then you have a delivery issue.
Pull the input line (yellow) and you should have free flow.
If you do not blow a little air into the line and see if that clears it to flow.
If it doesn't flow after air, then you have something in the tank that is not letting fuel out.
If you have good flow in then reconnect that line and pull the output (blue) and see how flow is there.
If your not getting flow then there is a problem with the canister, pull it and clean it, pay special attention to the input.
if you are getting flow then you could have an issue with the lift pump not delivering fuel to the pump.
I'll save that troubleshooting till we hear back from you.