Cranks but wont start

Apparently the relay is not being turned on. I believe that signal would come from the engine computer. Does your check engine light come on when you turn the key to on? If it does, the computer is powered up-if no check engine light, either the bulb has burnt out or the computer has no power-check for a bad fuse.
Put your finger on the fuel pump relay and have someone turn the key to on. Do you feel the relay tick? If you do, check if the relay has one hot wire with key off-use a voltmeter or a testlight. If you do have a hot wire at relay., check fuel pump wiring from relay to the pump. Pull off the connector at the pump and replug it back in.
If you can't find a powered wire at the relay with key off, maybe it is only hot when key is on, so turn key on and check relay again for that power wire going to the relay, one wire should have constant power there. If not, there is a wiring problem between the battery and the relay. If the relay has power to it, but you felt no pulse when turning the key to on, likely the relay is not getting a signal to turn on. A shop would need to investigate that.
Well, good luck, hope you find the problem.

The fuel pump in the tank could have failed. Check for fuel pressure on the fuel rail with a fuel pressure guage at the shrader valve. You could have some one bang on the fuel tank with a rubber mallet while cranking it may or may not still start if it starts it needs a fuel pump. If not need to check fuel pressure. Could also be other reasons.

Check if spark is comeing from your coil,,,than from coil to tops of spark plugs, If it is getting spark check your fuel pressure on the fuel pump,,,,,,If this is a high miler well this is what happens

yes. power comes from the fuel pump relay to that switch then to the pump Of course the wire will only have power in the crank mode, or for 2 seconds when key is turned to ON.

Try a higher cold cranking amp battery

you would have to fnd the gas line that goes to your motor disconnect and crank car to see if feul comes ,but some cars have a fuel line with a valve that you push in the little pin in the middle and should shoot out fuel looks like your aircondition line but it should be next to fuel injection line

could be the fuel pump or it may be as little as the fuel filter.

un hook battery and wait about an hour or so and use factory key if wont fix dealer has to reset.