On a UA trip in August 2019, travelling SNA-SFO-CDG with a CDG-ORD-SNA return, my wife and I (both with GE) got our normal TSApre boarding passes for the outbound legs. On the return I was able check in but my wife could not. She had SSSS for the CDG-ORD leg and the additional screening was done just after the security screening in T1. Upon arrival at ORD we asked to have her ORD-SNA boarding pass reprinted with (hopefully) the TSApre indication included. The agent at the transfer desk tried diligently but was unsuccessful.
On the other hand, last week I had SSSS for the LHR-SLC part of a return trip from London on DL and was successful in having my SLC-SNA pass reprinted with TSApre at the DL SLC transfer desk.