Font Awesome icons missing or bloated

I have a website and my theme already has 4 FA icons on the footer for social networks (Facebook, Instagram, Threads and Youtube). I also have a contact form with two icons: the Location and Email.

My issue: in the footer, the Threads icon doesn't appear. Its there, just invisible for your eyes. The mouse cursor over it detects the link.

Normal setting

I installed FA plugin to try to solve this, and activated the SVG option instead of Web Font. It fixed the Threads icon; however, the contact form icons turned huge and bulky.

SVG option ON

I either have one, or the other option. Is there a way to fix this?

The website is here:www.designefotografia.pt

The theme is OnePress (free version).

Thank you!