Tried building module for PHP7.2 and PHP7.4 both complaining about missing config.m4:
0$>phpize7.2
1Cannot find config.m4.
2Make sure that you run '/usr/bin/phpize7.2' in the top level source directory of the module
0$>phpize7.4
1Cannot find config.m4.
2Make sure that you run '/usr/bin/phpize7.4' in the top level source directory of the module