The phrase "afterward regarding" is correct and usable in written English.
It can be used when you want to refer to something that will be discussed or addressed later in relation to a specific topic.
Example: "We will discuss the budget proposal in detail afterward regarding the project's timeline."
Alternatives: "subsequently about" or "later concerning".
Galley tactics were so similar to land tactics that a reserve was actually held back a practice that ever afterward was regarded in navies as a mistake.
She said that afterward, BBC regarded her as "our Irene" and turned aside her agent's efforts to have her cast in other major roles.
When asked about this during a Google hangout immediately afterward, the President responded optimistically regarding immigration reform in Congress, but said that absent their action he would weigh all available options to ensure a rational immigration policy.
In the interviews, participants were encouraged to tell their story, and afterward, further explanations were asked for regarding experiences and emotions with pregnancy and motherhood, courtship, contraceptive use, and sexuality.
Lawyers for Live Nation and Cugliari successfully cried "speedy trial" afterward, and the Ontario Court of Justice stayed all charges regarding Johnson's death in 2017.
Afterward, the results were compared to the results regarding the same analysis of unframed terms from an earlier investigation [16].
Afterward, Congress sailed for Venezuela to observe and gather information regarding the ongoing Venezuelan War of Independence.
Soon afterward, Winehouse's father commented that when he had made public statements regarding her problems he was using the media because it seemed the only way to get through to her.
Afterward, however, doubts and suspicions began to occur to me, not so much regarding the plot's many dubious details, but regarding what seemed in hindsight like a glaring omission: despite the fact that the zombie plague appears to spread rapidly and indiscriminately, I didn't recall seeing a single infected child.
