Hello everyone!

Can someone please help me to run the conditional indirect difference test with categorical moderator using Stata 14.2? My research model: IV is Transformational Leadership, DV is Job Performance, Mediating Variable is Work Engagement, and Moderating Variable is Office Design (cellular is coded as 0, and open-plan design is coded as 1).
And my hypothesis is that transformational leadership will have an indirect effect on employee job performance via work engagement when the office design is open-plan rather than cellular. Results reveal that the mediated relationship between transformational leadership and employee job performance via work engagement is significant in open-plan office design (indirect effect = 0.149, SE = 0.073; 95% CI = [0.025, 0.320] as well as in the cellular type (indirect effect = 0.035, SE = 0.020; 95% CI = [0.001, 0.083]. Now I need to run another difference test analysis which shows that the coefficients for both levels are significantly different from each other. I have looked through some resources and watched videos about moderated mediation, but cannot find the syntax for conditional indirect difference test with a categorical moderator. Please help me with the Stata syntax to run that analysis.
Thanks a lot for your time.