USB tethering, WLAN and Bluetooth with notebook don't work, why?

I have a Huawei P Smart 2019 with Android 10 and a notebook with Windows 10 and want to access the Internet with the notebook. If I connect to a WLAN network e.g. An open one from Vodafone then works but with my mobile phone I can connect both but then it says "no internet" although I'm connected. Bluetooth and USB tethering should make it easier and faster, but it doesn't and I actually know my way around very well, I thought…

Can you tell me what I did wrong? It is not due to the cable. I can transfer data and if I e.g. I even tried to connect via WLAN without encryption. I can reconnect but can't establish an internet connection…

First the basics:

Tethering means that your mobile phone is used as a hotspot or router. If tethering is set up, you can use the internet connection of your mobile phone with any other device. Just like the router at home, which you can use to access the Internet with all online-capable devices (PC, laptop, tablet, smartphone, smart TV, Nintendo, etc.).

First you have to set up tethering on your mobile phone. I recommend the WLAN version because it allows you to keep the greatest possible range of motion. With USB, your tethering ends with the length of the cable, with Bluetooth you can create around 10m and with WLAN you can bridge up to 100m in free space.

The connection between cell phone and notebook - so your description - works. That said, tethering is set up properly. Now you only have to activate the mobile data connection of your cell phone so that the connection to the Internet can be established. If your data connection and your tethering connection are correctly set up and activated together, you should also be able to access the WWW with any Internet-enabled device - via your mobile phone.

Thanks for answering my question… But it didn't do me any good. Mobile data is always on because I still have 40GB of data. I don't have a router because the technicians will only be arriving in a few days. The range of the connection would not matter to me, the main thing is that I can access the Internet on the notebook via the cell phone line. But it doesn't work and I think it's due to some settings that have to be made on the mobile phone. Because if I use an open Wi-Fi network such as Vodafone Hotspot with my notebook, then I come to the page where you can buy tickets. As soon as I connect to my mobile phone, however, it says in the lower right corner above the clock where the WLAN connections are displayed that I'm connected to my home spot but no internet would be available, which is totally illogical…

Thank you for your help! Could this be due to the new update of the Android version to 10?