I'm looking for the commands Sketch profile and Convert element to profile. Can I get these commands in Connect edition?

I believe its deprecated but still exists (for the moment). In V8i, it was in the DD Design toolbox, but according to the online help, that is now found within the Feature Modelling Toolbox (also deprecated)

https://docs.bentley.com/LiveContent/web/MicroStation%20Help-v18-16-1/en/ProfileSketchProfiletool.html

Barry is correct in that it is still currently available under the DD Design toolbox but is listed as a deprecated operation. The replacement operation would be to use the Parametric modelling tools using Constraints etc. The following Live Sig I found on our Youtube Channel may be of assistance.

3 - MicroStation: Parametric Modeling: Design Intent, Live SIG Excerpt, Feb 26 2019