I think you may need to investigate the shift cable rather than the derailleur setup. The original R7000 (105) Shimano cables are optimised for low friction shifting, so it may be you don’t have an original Shimano [Optislik] cable and that is causing extra friction, or the cable may b...
Shimano is coy on whether there have been any specific improvements to shifting speed or quality, compared to the previous-generation, 105 R7000 groupset. When pressed on the subject, it simply said “R7100 adheres to Shimano’s own high standards for shifting performance”. Shimano 105 RD-R...