How to convert a 144 ppi page to 300 ppi in photoshop?

Question

Data conversion

There is a magazine page with photos and text in A4 format, but in a resolution of 144 ppi.
When printed, the text is a bit blurry. The printing house said that it is necessary that the pixel density be 300 ppi, and then everything will be fine.
Is it possible to somehow quickly convert the file to this resolution? After all, in fact, the page size is A4, only the density is not the same.
I just have a whole magazine there - 38 pages. And it will take a lot of time to edit each manually.

Answer 1

In fact, you need to stretch the image twice (this will happen if you set ppi twice as much for the same document sizes).
The printing house does the same thing - they stretch your source twice when printing, so the text is "obscure". They assumed you had a normal resolution source (or even inDesign), so they said 300 ppi.
The only option is to manually process the text blocks after zooming, using some kind of unsharp mask, but this is all monkey work and there will not be much sense.

Answer 2

What means

Has a magazine page

? In what format? Is it a PDF? Raster as jpeg or tifa? Layout in Indesign?
If you display bitmap text even at 300 dpi, then nothing good will come of it. For text, you need either a resolution greater than 600, or a purely vector one. No processing of low resolution raster text will improve it - only retype and retype in normal form. You can recognize the type of fine reader, it will make your work a little easier