"regarding not only" is correct and usable in written English.
It is generally used in a sentence to introduce two or more topics that will be discussed. Example: "The presentation was insightful, regarding not only the history of the organization, but also the strategies for its future success."
I discussed Morten with a range of my contacts in Europe and each gave a glowing report regarding not only his ability, but also his character".
The paper's findings demonstrate huge variety regarding not only the instruments applied and schemes developed, but also the political motives and priorities over the past 30 years.
This paper presents an experimental study focused on the structural behavior, regarding not only bending strength but also ductility of reinforced lightweight aggregate concrete (LWAC) beams.
Electrode structural stability and mechanical integrity is of major importance regarding not only lithium-ion battery performance but also safety aspects.
Thus, it can be inferred that the ETA indices encode important chemical information regarding not only the topological attributes, but also the effect of electronegativity, molecular volume, branching, shape parameter and nature of atoms and bonds, etc.
The aim of this study was to identify, categorize and rate studies on rehabilitative therapeutic approaches for IPS regarding not only study design and statistics, but also clinical relevance.
But it is now regarded not only as an asset, but if badly managed, an obstacle to modernizing.
Since the days of Diana Vreeland and John Fairchild, the former publisher of Women's Wear Daily, fashion editors have been regarded not only as journalists but as boosters for the industry.
John Hurt's narration sets the sardonic tone of an epic diatribe that regards not only American history but the human condition itself with cold, amused disgust.
For 46 years Maria has spent every Tuesday working for Mrs. Ellington, a woman she regards not only as an employer but also as a confidante.
While stakeholders also saw the need for extrinsic incentives such as micro-credit, regular wages were regarded not only as financially unfeasible, but as a potential threat to the Volunteers' social respect, and thereby to their motivation.
