The Celestron Powerseeker 127EQ is kind of famous among amateur astronomers experienced with helping people learn to use a first telescope, and not in a good way.
I helped a guy with one this last summer. He bought it right after Astronomy day in the Spring.
He came to our astronomy club's Outreach event at the local library.
I recommended he check with an experienced member in the club before he bought a telescope.
He didn't.
He was kind of astonished how much clearer and sharper the views were in my 80 mm (3.1") refractor compared to his 127 mm (5").
To keep the length of the tube short, and the telescope cheap, the Celestron Powerseeker 127EQ uses a Jones-Bird optical system that greatly hinders how well the telescope can perform.
Newtonian telescope - Wikipedia
As long as you keep the magnification low and don't use the included 3x Barlow, it's an OK first telescope.
There are others in the under $300 price range that perform
way better and are a better value.