Hi @maragotti,
I understand you are not seeing the Login or Register button on the My Account page. I was able to replicate this on your site:

Link to image: https://d.pr/i/JWNvU1
I’m however not able to replicate this on my end:

Link to image: https://d.pr/i/y2Saqx
Usually, isolated behavior like what you describe and which has not displayed during our cross-testing can be related to code with another plugin or a theme that is causing a potential conflict of some kind.
This kind of problem is usually caused by either a conflict with your theme or with another plugin.
?
The best way to determine this is to:
- Temporarily switch your theme to Storefront
- Disable all plugins except for WooCommerce
- Repeat the action that is causing the problem
If you’re not seeing the same problem after completing the conflict test, then you know the problem was with the plugins and/or theme you deactivated. To figure out which plugin is causing the problem, reactivate your other plugins one by one, testing after each, until you find the one causing conflict. You can find a more detailed explanation on how to do a conflict test here.