Engine cold but now it doesn't start at all

Hello,

So, when you turn the key what does it do?
Does the engine cranks but not start? Or when you turn the key, nothing happens?

If the engine does not crank, only makes clicking noise it could be a bad starter. If it does not make any noise at all, it can be a bad ignition switch or wiring issue.

If the engine cranks but not start, you will need to check to if you are getting spark and fuel.
Even with a new fuel pump, if there is a clog in the fuel lines or a bad fuel pressure regulator, it will not start. So, checking the fuel pressure can help narrow down the possible cause.
This vehicle should have 41-47 PSI of fuel pressure with the key on and engine off.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

This can also be due to a faulty crank position sensor. A malfunctioning crank sensor will send error codes to the ECM and that will trigger an engine shutdown. It may or may not start back up afterwards.
The crank sensor is mounted near the harmonic balancer.

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor
https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

I have attached diagrams for your reference.

Please let me know if you have any questions.
Thank you.