How can you correct EBU R128 loudness in Premiere?
In general loudness correction is a two step process. (There's a little more to it for full EBU R128 compliance, but I work exclusively in the US and this all that is required for A/85 / CALM Act compliance.)


Measure the long term/infinite loudness of the asset.
Shift the level of the asset by the difference between the measured loudness and the target.


Premiere does not have a built in method for automatically correcting loudness. But you do have a few options:


You can use the built in Loudness Radar plugin to measure the long term/infinite loudness of the asset and then manually shift the level by the difference from the measured loudness and the target loudness.
You can buy a third party plugin to do the correction.
You can use FFmpeg as I paraphrased the last time you asked this question.
You can use Adobe Media Encoder.