Hello, @Lodrigo.
To set the “regular 400” font weight for the Poppins font in WordPress, you will need to ensure that you have downloaded the correct font files.
First, make sure you have downloaded the “Regular 400” font weight of Poppins from Google Fonts. You can do this by visiting the Poppins page on Google Fonts, selecting the “Customize” tab, and choosing “Regular 400” from the “Select styles” section. Then, click the “Download” button to download the font files.
Then upload the complete zip file to Porto >> Theme Options >> Font Control and you will be able to use it.
Regards, P-THEMES.