Welcome to the forum @SilviaPatteet
Changes in colour hues and saturation of dng files from PhotoLab as seen in Lightroom depend on how saturated coulours are in the original raw files and how one sets coliur space, softproofing, rendering intent and the checkboxes and sliders for colour detail preservation.
All things set equally, PhotoLab 6 and 7 should produce dng files that look very similar in Lightroom. Slight differences might still appear due to slightly different defaults im DPL 6 and 7.
Many posts have been written about such matters and @John-M has been very active in this for DPL on Windows. Find John’s contributions with forum search. Have a look at a recent thread: