(for styles only)
https://www.drupal.org/project/imageapi_optimize
https://www.drupal.org/project/imageapi_optimize_binaries
dont forget:
https://www.drupal.org/project/imageapi_optimize/issues/3011829
https://www.drupal.org/docs/8/modules/image-optimize/site-builders-guide
https://tinypng.com/developers
https://www.drupal.org/project/imageapi_optimize_tinypng
https://www.drupal.org/docs/8/core/modules/image/working-with-images