Agile is old. A bunch of the ideas from the manifesto, like f2f communication being best, don't hold up in 2020. We basically made up our own style based on agile, scrum, kanban and a bunch of personal experiences.
I’d agree with this. Following an existing system gives you a good starting point, but every organization is different. Follow and come up with your own. It’s ok to try new things or experiment.