Zend certified PHP/Magento developer

Unable to ping or use VPN when connected to a 5G router

I am using a Zyxel FWA510 router. It’s a 5G router and I use my Telekom 5G sim with it.
After I start up the router and connect my Laptop (Macbook Pro 2021) through wifi with it. I cannot do the following things:

  1. I am unable to ping 8.8.8.8
  2. I am unable to connect to my Work VPN
  3. I am unable to use my personal VPN software either

This is really frustrating. Is a port blocked that should be open? Do I need to disable IPv6?

I tried turning on the IPSec passthrough setting, but that did not work either. What should I do?