There were a few interesting quotes from a Bills article.
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"Wendell is now a rising coach within the Bills organization, first joining Sean McDermott’s staff as a coaching assistant in 2019 before being promoted to assistant offensive line coach the next year. He remained in the position after the Bills made a change to the position group, moving on from previous offensive line coach Bobby Johnson after his contract expired at the conclusion of last season and instead hiring Aaron Kromer."

"Wendell was a strong candidate for New England’s job...The Patriots announced that they hired former Oregon assistant Adrian Klemm for the job, reuniting him with new offensive coordinator Bill O’Brien and allowing the Bills to keep a key member of their staff for a position in need of upgrades."

"The interior of the Bills’ offensive line was a weak point at times, especially in the playoffs where the Miami Dolphins set a franchise record with seven sacks in the Super Wild Card round. The Cincinnati Bengals also hounded Allen in Buffalo’s divisional-round loss."