Compress Images Lossy Level

Hello Eduardo, the compression is lossy and for JPEG images progressive. The quality is determined intelligently based on the image characteristics. The maximum level is detemined by your WordPress installation.

What you could do however is change the maximum level in WordPress itself which is 82. The plugin will then work with these higher quality thumbs. Here is maybe a good article: https://www.wpbeginner.com/wp-tutorials/how-to-increase-or-decrease-wordpress-jpeg-image-compression/