What will happen to my I-526 petition if I withdraw my funds from the regional center after job creation is met?

Will need more facts to answer.

The investment has to be sustained through until the I-829 filing and in order to get an I-829 approval you need to show that the investment has not been withdrawn.

If you withdraw your investment, most likely, your I-526 will not be approved. Even if it is approved, you cannot get through the I-829. Better to find another project to restart.

To remove the condition on your two-year green card, you must sustain the investment and the project must create the jobs within the conditional/sustainment period. Therefore, to receive the conditional green card in the first place, it follows that you cannot withdraw the funds early, even if the jobs have been created.

I would advise you not to do this until your permanent green card is issued. You should discuss this with your own immigration lawyer.

The I-526 could be approved; the adjustment of status might be approved as well (assuming no one asks for proof of sustained investment). But if you withdraw the funds, you will fail at the I-829 stage, at which point you are required to demonstrate that you sustained your investment at the time of I-829 filing.

You should request prompt repayment of your EB-5 capital investment. Then you will need to withdraw your I-526 petition and then re-file a new I-526 petition with a different project (one that is already under construction and has a funded senior loan that is not impacted by COVID.)

It will be denied.