The original owner of the land also has a home right next to this that was sold due to delinquent taxes, and the investor who purchased the land said that the owner did not even show up for the court ejectment case.

Ejectment lawsuit can be filed after previous owner redeems but can it also be filed before he redeems?

You don't need cash for keys here, just file for an ejectment.

Ejectment suit not initiated due to the service doc; and at this point it seems moot       . 

Lehigh county court wouldn’t take my ejectment filing.

I also told him that I had about 7 months left until I can get a tax deed and start the ejectment process, take possession.

I have another property that I’m currently going through an ejectment with so trying to avoid similar issues due to the moratorium in PA.

This is where the agent is ejected and the process runs smoothly and hassle free.

By September, the process of summary ejection and eviction should have run its course and by November or Dec, you and your lender should be back on track. 

Both have suspended foreclosures, ejectments and evictions for many months now and at least until September if they don't extend again .