The issue isn’t changing your default. It’s what the default search engine is set to by… default.
A selection screen should come up when you first open your browser to ask you about setting the default search engine, but how that list is built is problematic. IINM google was slapped on the wrist for setting Google as the default on android and their solution was to allow companies to bid to get onto the default search engine list to allow users to select their default search engine. That meant companies with more money could afford getting on the list: https://www.bbc.com/news/technology-51048412
The issue isn’t changing your default. It’s what the default search engine is set to by… default.
A selection screen should come up when you first open your browser to ask you about setting the default search engine, but how that list is built is problematic. IINM google was slapped on the wrist for setting Google as the default on android and their solution was to allow companies to bid to get onto the default search engine list to allow users to select their default search engine. That meant companies with more money could afford getting on the list: https://www.bbc.com/news/technology-51048412