Is kissing with lust and touching the body of one's revocably divorced wife during her waiting period, without the intention of reconciliation and while she is menstruating at the time of the act, considered a reconciliation or a sin requiring seeking forgiveness?

What you did by enjoying your revocable wife is forbidden according to the Shafi'is. According to the Malikis, repentance and seeking forgiveness are necessary if you deliberately did so, knowing it was forbidden. However, the Hanbalis and Hanafis permit it.

Revocation occurs by touching the revocable divorcee with desire or looking at her private parts with desire, but only according to the Hanafis. It does not occur by these actions according to the Malikis and Shafi'is. The correct view among the Hanbalis is that it does not occur by these actions.

The majority of scholars hold that what you did does not constitute a revocation. It is safer to avoid similar actions to steer clear of the disagreement of those who deemed it forbidden.