Current Microsoft Edge, 88.0.705.63 has "Vertical Tabs" feature, but this one is not enable, by default. But you can enable it.
I'v read this blog article and tried.
How to Enable and Use Vertical Tabs on Microsoft EdgeFrom this article:
- Put "edge://flags/#edge-vertical-tabs" in the address bar
- Set it to “Enabled” from the dropdown menu and then click the Restart button for the change to take effect.