In some fields, methodology is pretty standardized. Gather some data, do some statistical analysis, report the results. The creativity and innovation isn't in the methodology, per se, but in the questions asked and the possible impacts of the answers.
In such a field, it would be common to see similar wording in the required methodology section. Since you are referring to a single lab, where people also discuss things like methodology, I wouldn't be at all surprised - or worried.
In some ways the "methodology" in a field like math is so standardized that papers don't need a section on it. It is just understood. In some, the methodology is itself innovative at the moment, perhaps in machine learning. But in fields like biology and the humanities where statistical evidence may be the main driver for some threads of inquiry, you can expect similar words.
Similarity doesn't imply plagiarism. You aren't misattributing ideas by using common methodology.
What you should do is relax and except the world as it is.