2012 prius V Dilemna please help.

My wife and I purchased a Toyota prous v 2012 about a year ago

It is now at around 150k

At around 147.5k I drove it about 2k over the limit for estimated mileage change for

Estimation was 145 and i think I was around 147k and got the oil changed somewhere between 147-148k after driving the vehicle on red oil change indicator light for maybe a week at 300 -500miles in southern Az

I know realize this was stupid of me

Made it to phoenix and I was told by a mechanic there was no oil and had I drove it about few miles the engine would have gone so they put 4 quarts of oil in there

In the palm springs area at around 150,500 a few days ago I noticed some hesitancy in acceleration at intersections arriving in palm springs at intersections slow to accelerate and at 30mph I could really feel lack of power and the vehicle not wanting to accelerate to 50mph

It has been hot this summer in Az and I have driving alot being housless.I have some autoimmune conditions and may also be borderline autistic

A mechanic in Indio,Ca charged me 130 cash to put in oil as he said it was empty.He wouldn't accept debit.No diagnostics done but test driving. He said its OK just drive the car more lightly and let it charge.

I told him this is a hybrid not electrical

It drove slightly better after he added oill Friday morning .And then Saturday after checking put of the hotel it drove even better

The hesitancy during reversing and accelerating forward mostly disappeared. I guesstimate it may be 75% to 90% of function intuively though I could be wrong.Just slightly less power at mid to higher speeds

So the car drove from 147-148 k miles to 150,500 and burned 4 quarts of oil in the process.There is no visible pu

At first I thought I went through 4 quarts in 700 miles

I have some memory issues its possible that I may have gone through 4 quarts in 2k miles

There is no noticeable oil leak

Anyways I camp in the vehicle due to environmental illness and only receive a small disability check and so does my wife

Im looking for low income housing for her meanwhile I will need to continue remaining outdoors and have a functioning vehicle

And only have about 3k left in savings

Is it almost certain that the engine is gone or partially damaged rather than extreme Az heat causing this even though the car drives much better after the oil was added 2 days ago ?

There is

Maybe about 80% of original horsepower and acceleration as it was originally inutively guesstimate

I need this vehicle for mold avoidance and cannot afford to be stuck indoors in conventional housing due to health reasons

Thank you