"Concerning in initially" is a very awkward construction and I cannot think of a way to use it in a good sentence. Maybe there is a very odd way to use it, but we would recommend finding another way to express your thought.
Concerning your problem Bobert, I don't care if your wife ate your pet potato.
Initially, I didn't want to write this sentence, but I changed my mind.
The impending danger was initially unapparent to all of us.
Before meeting my boss, I conferred with the secretary concerning his mood that morning.
The mortality from the Pandemic Flu was not as great as was initially feared it might be.
All pollen grains develop initially in groups of four called tetrads.
I had initially declined the offer, but upon further reflection, I may reconsider my decision.
After an initial bid of $10 the bidding rose to $25.
There were many devastated people concerning theonerousnews about the hurricane destroying a large number of houses.
The word initially is indeed an adverb, yes.An example sentence is:We were initially very excited about the trip.
A statement is a sentence that conveys information or opinion. In writing, you can use a statement to make a point or provide a fact. For example, "Her statement about the company's financial situation was concerning."
Example sentence - Only time will show if the decisions made concerning NAFTA were in the best interest of our country.We would like to reverse NAFTA in North America.