...and so, if you know your company is paying any amount of money for their slack channel, you must assume it is the "
Compliance Export" version, unless you have direct awareness of the version your company has paid for.
Furthermore, and this should go without saying, no matter what your company pays for, you also must assume that Slack themselves possess god mode across all channels, except maybe "on prem" implementations if that's what they mean by enterprise/discovery api.
When a feature like this is in the loop at all, how can any ordinary end user presume any other level of trust?