Not really man, don’t forget that Harla clan names, people, and places were mentioned in Futuh. I, a speaker of the Harari language, understand what they mean. For example, the location where the army of Imam Ahmed crossed the Awash was called Dir. Dir means “plain” in the Harari language. When you say something is in plain sight, you would say “Dirre be hal.”
I could go on and on with Harla names that were mentioned and I can explain it to you. Like how Awash and Abbay Rivers are connected.
Somalis do not have a linguistic connection to Harla, contrary to popular belief. “Af Harlaad” is just Somali language with a few letters flipped around, while they can’t tell me what any name of Harla means

. Enrico Cerulli did a good job setting up studies in the Horn, but it was rudimentary. There are more advanced studies that is challenging some of his works.
It is totally possible for Imam Ahmed being Harla to settle disputes. If you read Futuh, in the beginning Imam Ahmed’s core was agriculturalists that fought against the Sultan and his Somali power base. He beat the Sultan with his Harla agricultural power base like Abu Bakr Qacchin, and with his already existing ties with other friendly Somali tribes (like his in-law Garad Matan) he clamped down on any Somali opposition. Isn’t that why he went to invade Somalis before he went to Abysinnia? He wasn’t a wimp and took his strong power base and invaded their settlements near the sea. He didn’t have to be Somali to do that.
Harari manuscripts describe the situation after Imam Ahmed, with Amir Nur’s actions towards aiding the Harla refugees and telling the other cities to copy the results of Harar, from hundreds of our villages being sacked by the ongoing Oromo onslaught, Amir Nur taking his troops to invade Abysinnia again and abandoning them in modern day Silte land. The tragic defeat of the Battle of Hazalo (Azalo means “they climbed”, it’s a mountain). The power struggles in Harar after Amir Nur’s death. The elite moving their capital to Awsa after failed leadership struggles. That’s why Afar claim they are Harla. In the Afar chronicles family tree, Harari names like Dus are present. Harari manuscripts are very helpful in understanding the period.