Improve vehicle performance

Hi, 1999 Toyota 4Runner. My vehicle is not developing full power. I had it overhauled in January 2024 at 153,000. Could you help me determine what items I should have checked to enhance performance? Some things that come to mind are:
Clean the mass air flow meter and replace the engine air filter
Remove air while filling the radiator fluid
Spark plugs have already been replaced
There is no smoke from the exhaust
The bonnet heats up without the car running for too long. This might be due to air in the radiator fluid. There is no engine check light coming on for the catalyst converter.
Please mention the smaller items that can be overlooked. I don't think that there is anything major wrong with the vehicle.
Thank you.

 

What’s the engine and 0-60?

Are the tires the stock size and load rating?

 

Get a compression test at a reputable shop if none of the little things help. Seems like something odd could have happened during the overhaul. Post pics if you can.

 

Your car sounds normal.

What's your MPG? If you get 17mpg in the city and 19mpg on the highway, congrats, you have all the performance you can get.