there are 3 standard contingencies:
Appraisal, Inspection and Loan.
The ‘standard’ default for each is 17 days, HOWEVER it is negotiable.
YOU WANT those contingencies to be as long as possible to protect you, YES it is your way to get out if necessary.
I would NOT recommend removing the appraisal contingency. (UNLESS your situation is unusual)
Whose side is your agent on ???

I’m a licensed agent for both real estate & mortgage.
I’m not trying to take business away from anyone, but if you want a 2nd opinion contact me privately.
There’s no charge or obligation.
I’ve helped many Pigg’s through some difficult situations. HLS