Hi @real_gabagole,
You can access audit in flows by using the "Audits" table in List Rows action. The changedata property will contain the old and new values.

Here's a sample of the outputs:
{
"_objectid_value": "570f61a7-621d-418e-98bb-84b19e54c7a6",
"_userid_value": "65cf1a65-8ee0-446f-b43c-a334f451f964",
"versionnumber": 638317094169807400,
"operation": 1,
"createdon": "2023-09-30T15:08:07Z",
"auditid": "36158023-a35f-ee11-9937-000d3ad04896",
"changedata": "{\"changedAttributes\":[{\"logicalName\":\"organizationid\",\"oldValue\":null,\"newValue\":\"organization,23e75271-8e63-4f54-bdfc-9180bb3f5cd7\"},{\"logicalName\":\"onclickeventjavascriptparameters\",\"oldValue\":null,\"newValue\":\"[{\\\"type\\\":8,\\\"value\\\":null},{\\\"type\\\":12,\\\"value\\\":null}]\"},{\"logicalName\":\"context\",\"oldValue\":null,\"newValue\":\"1\"},{\"logicalName\":\"hidden\",\"oldValue\":null,\"newValue\":\"True\"},{\"logicalName\":\"onclickeventjavascriptfunctionname\",\"oldValue\":null,\"newValue\":\"XrmCore.Commands.Open.openNewRecord\"},{\"logicalName\":\"buttontooltiptitle\",\"oldValue\":null,\"newValue\":\"New\"},{\"logicalName\":\"statuscode\",\"oldValue\":null,\"newValue\":\"1\"},{\"logicalName\":\"visibilitytype\",\"oldValue\":null,\"newValue\":\"2\"},{\"logicalName\":\"origin\",\"oldValue\":null,\"newValue\":\"1\"},{\"logicalName\":\"buttonaccessibilitytext\",\"oldValue\":null,\"newValue\":\"New\"},{\"logicalName\":\"onclickeventtype\",\"oldValue\":null,\"newValue\":\"2\"},{\"logicalName\":\"type\",\"oldValue\":null,\"newValue\":\"0\"},{\"logicalName\":\"sequence\",\"oldValue\":null,\"newValue\":\"1000100010.0000000000\"},{\"logicalName\":\"buttonlabeltext\",\"oldValue\":null,\"newValue\":\"New\"},{\"logicalName\":\"buttontooltipdescription\",\"oldValue\":null,\"newValue\":\"Create a new {EntityLogicalNameMarker} record.\"},{\"logicalName\":\"contextentity\",\"oldValue\":null,\"newValue\":\"entity,84a5c837-6210-11e0-834f-1cc1de634cfe\"},{\"logicalName\":\"name\",\"oldValue\":null,\"newValue\":\"Mscrm.HomepageGrid.postfollow.NewRecord\"},{\"logicalName\":\"location\",\"oldValue\":null,\"newValue\":\"1\"},{\"logicalName\":\"isdisabled\",\"oldValue\":null,\"newValue\":\"False\"},{\"logicalName\":\"fonticon\",\"oldValue\":null,\"newValue\":\"$clientsvg:Add\"},{\"logicalName\":\"statecode\",\"oldValue\":null,\"newValue\":\"0\"},{\"logicalName\":\"contextvalue\",\"oldValue\":null,\"newValue\":\"postfollow\"}]}",
"action": 1,
"objecttypecode": "appaction",
"transactionid": "5f1e9c1d-a35f-ee11-8df0-0022489333d6",
"_regardingobjectid_value": null,
"useradditionalinfo": null,
"_callinguserid_value": null,
"attributemask": "16,60,45,50,59,42,20,81,85,38,62,64,84,39,41,47,27,53,87,49,18,48"
}
Hope this helps!