https://wccftech.com/how-to/how-to-move-multiple-chrome-tabs-to-a-new-window/

Some things may be super straightforward but if you don't use a product or a certain function frequently, chances are you will end up going with a more complicated route than the simpler solutions. With Chrome and our obsession of opening 100s of tabs, it often becomes an extremely tedious process to manage things. Sometimes to trick ourselves into focusing on the task at hand, we end up moving a few tabs to a new window to give ourselves some semblance of tidiness amid the usual browser clutter.

Until group tabs become a norm, here is how you can move around multiple Chrome tabs instead of individually selecting and dropping them onto a new window.