Xdebug 3 completely changed how things are done.  You can find a document explaining those changs here.
The default port is now 9003 instead of 9000
Due to those changes we've changed the way all future php releases are configured.
the [xdebug] section in php.ini will be changed to this. 

[xdebug]
xdebug.mode = debug
xdebug.start_with_request = trigger
xdebug.output_name = cachegrind.out.%t.%p
xdebug.output_dir = "~BEARSAMPP_LIN_PATH~/tmp/cachegrind"
xdebug.var_display_max_children = "1024"
xdebug.var_display_max_depth = "8192"
xdebug.var_display_max_data = "32768"
xdebug.max_nesting_level = "250"