Here is a good example of Oliver Cowdery initially mishearing Joseph Smith’s dictation. In 𝓞, Oliver first wrote meet, which is phonetically very similar to the correct word here, beat (the only phonemic difference between the words is the nonnasal labial b versus the nasal labial m). Semantically, meet will also work here, which helps to explain why Oliver made this mistake. Elsewhere the text has examples of both meeting and beating an opposing army, including the following passage where both verbs are used: “we did pursue them with our armies and did meet them again and did beat them” (Mormon 2:26).
Here in Alma 57:22, Oliver Cowdery crossed out the incorrect meet and supralinearly inserted the correct beat. There is no change in the level of ink flow, which suggests a virtually immediate correction.
Summary: Accept in Alma 57:22 the corrected reading in 𝓞, where beat replaces the phonetically similar meet.