Wago makes a series of alternatives to wire nuts.
While shopping online, I encountered knockoffs of the Wago 221 series electrical connectors.
The knockoffs however bore only a CE mark, no UL certification. And the reviews spoke of wires that pulled out easily, weak springs, and all the things you might expect of a knockoff. The brand had no website, and no safety data or test results were presented. You might consider the above a red flag, or maybe a glowing red flag.
The originals look like:
https://www.wago.com/us/lp-221
https://www.wago.com/global/certificates