The Wisconsin DPS has updated their listing of states they will honor. They will honor the OK License:
Oklahoma license ISSUED OR RENEWED ON OR AFTER 10/01/2018.
You can see the listing Here: https://www.doj.state.wi.us/dles/cib/conceal-carry/reciprocity
As you can see from their listing they honor other states only after a certain issue date. Their law on reciprocity states
165.25 (16)
Rules Regarding Concealed Weapons Licenses. Promulgate by rule a list of states that issue a permit, license, approval, or other authorization to carry a concealed weapon if the permit, license, approval, or other authorization requires, or designates that the holder chose to submit to, a background search that is comparable to a background check as defined in s. 175.60 (1) (ac).
Link to WI Statute on Honoring other states: http://docs.legis.wisconsin.gov/statutes/statutes/165/25
Oklahoma license ISSUED OR RENEWED ON OR AFTER 10/01/2018.
You can see the listing Here: https://www.doj.state.wi.us/dles/cib/conceal-carry/reciprocity
As you can see from their listing they honor other states only after a certain issue date. Their law on reciprocity states
165.25 (16)
Rules Regarding Concealed Weapons Licenses. Promulgate by rule a list of states that issue a permit, license, approval, or other authorization to carry a concealed weapon if the permit, license, approval, or other authorization requires, or designates that the holder chose to submit to, a background search that is comparable to a background check as defined in s. 175.60 (1) (ac).
Link to WI Statute on Honoring other states: http://docs.legis.wisconsin.gov/statutes/statutes/165/25