Exporting pdf from indesign quallity

Hi, I've been struggling lately exporting a pdf from InDesign for print, I've exported it and got my pdf nice and clear, then when importing that to Photoshop to create a mockup of the print work the quality is greatly reduced, the txt is unreadable and pixelized , I've tried several settings on export nothing seems to work, i used to do this process a lot in the past and it worked seamlessly , did anything change ? how do i solve this?