Config Export Ignore

This module allows to ignore specified configuration entities from being exported by config split.

Config split allows to split configuration, but in some cases you want to ignore files from being exported at all. Something like migrate_plus configuration files. So you can specify all these configuration entities in config from and it won't be exported.

Other ways to prevent config from being exported

Drupal core default config export command also allows us to do that.
drush cex --skip-modules=devel
But limitation here is that, you will skip all the configurations from devel module, where as using config_export_ignore we can specify separate configuration files to ignore.