Get rid of Microsoft Teams (Business Standard + Premium!) freezing + Zoom freezing with and without VPN in global settings

I have it continuously: all Teams and Zoom meetings are freezing with "unstable internet" mentioning and then cut off audio and video, people see me freeze.

Whether I am working for my US-based business with my Microsoft US-geographic Business Premium (2 domains 1x com, 1x academy), or with my EU-based location Business Standard (2 domains 1x com, 1x .be). It is always the same, for almost 2 years now, and there's no difference in experience, working from either which domain, with or without working on my professional NordVPN connection with dedicated IP's, both in the USA as in Europe.

For Microsoft two different geographic locations and therefore two different working Teams apps, but in my modest opinion, that should not have to make a difference when in a course, presentation, negotiation or online mediation.

Fact is that I can't affort having this when I'm talking to clients and B2B. It shows very unprofessional and it disturbs especially when negotiating or mediating.

Telenet (Belgium, but for 70% in US Investor hands) monitors no disturbance at all on the internet connection inside or outside the building I'm in for over 1 year. I also tried it in a public environment (MacDo / Starbucks), but it's completely the same experience.

All suggestions to solve, mentioned in other question-treats and answers from Microsoft-support, have been done by ourselves, long ago, but without any success.

I also have checked my (Windows HP Elite + MacBook Pro-)desktop apps and mobile (iPhone) apps. Because it appears also on the Windows desktop it is unlikely that it is an Apple issue.

To be honest: we need to have this solved, as soon as possible to protect our our relationships (B2B+B2C). We're out of creative ideas to get it to work without any disturbing freezing moments, but it's a priority to have it done, anyhow.

FYI: I did not use AI, so this problem is original and written by myself.

Summarized:

When I use Teams, both with a Microsoft Business Premium USA-geographic based account, and with a Microsoft Business Standard Europe-geographic based account, on my Windows HP Elite (G8, 2020) or my MacBook Pro (M1, 2020), both when I organize a meeting, and when I join a meeting, organized by another, globally based, organization, with or without using a NordVPN dedicated IP, my video and audio are freezing frequently after the first 15-20 minutes. It keeps freezing after the first time during the whole meeting. It shows definitely as an unprofessional behavior, and it has been mentioned like that by a business relation, who used Teams from a New Zealand based business account. The same issue appears when using Zoom. Some other relations (globally spread, from US, UK, Switzerland, Australia, NZ, India) are telling me they experience exactly the same.

FYI:

We prefer using Teams, also with external guests, and we would like not to be forced to change this in moving to Zoom.

Thanks to all in advance to help us solve this annoying problem.