The phrase "afterwards once again" is correct and usable in written English.
It can be used to indicate that something is happening again after a previous occurrence, often in a narrative or descriptive context.
Example: "After finishing the project, she took a break and afterwards once again resumed her work with renewed energy."
Alternatives: "subsequently once more" or "after that again".
Olimpia will reach the 1991 Copa Libertadores finals afterwards, once again, defeating Atlético Nacional in the semifinals and face Colo-Colo.
Following adult eclosion, all butterflies were marked individually and afterwards once again randomly divided among 20°C and 27°C, resulting in four rearing by adult temperature groups per selection line 20-20°C 20-20°C°C, 20-27°C 20-27°CC). 27-20°C 27-20°C
10% formalin fixed slices of the organs prepared for paraffin-embedding were decontaminated in formic acid for 1 hour (98%, Sigma Switzerland) and afterwards fixed once again in 10% formalin for 48 hours.
Afterwards, they once again rated the intensity of the major symptoms of PTSD during the last 4 weeks, how much they were ruminating about their traumatic experience at that time, and how stressful and unpleasant those memories were at the time.
In the medical room afterwards Swagger was once again confronted by Bo Dallas, who told him that he 'let his country down' and to 'Bo-lieve'.
It took an adroit piece of covering from Ryan Haynes to deny Locadia a tap-in shortly afterwards and then, after March had once again sped away from Jack Grimmer down the Brighton left, Locadia completely missed his kick with the chance laid on a plate.
When they did go out to inspect afterwards the heavens opened once again and play was abandoned for the day.
Joe makes his way to her, trumping the Jadow's leader Inferno Lord Fire Leo in combat, only to witness Silvia being kidnapped once again afterwards.
Afterwards, the bypassing is attempted once again for the destinations that did not get bypassed during early bypassing.
Once again, reward the dog afterwards.
"Afterwards, we're able to return to calm once again".
