No. There was talk of it and moving to a different software. During the big reddit exodus Lemmy became unmanagable in terms of sane moderation.

What did happen is Beehaw defederated from some instances that were the worst offenders. Sadly, a few of them were fairly large.

There is also the mission of Beehaw of being a safe space which makes modertion more difficult. Beehaw was never intended to be for everyone where everything goes.

My memory is a bit foggy because decisions were taken a few years ago but things never really happened, but the information you're looking for is probably on !support@beehaw.org

If I remember correctly the idea was to switch from Lemmy to something else