Feedback from SCIP devs: support was introduced in SCIP 8.0.0 (early 2022), see:
- SCIP 8.0.0 release notes https://scipopt.org/doc-8.0.0/html/RN80.php (in “Expressions” section)
- in the SCIP 8.0 paper https://optimization-online.org/2021/12/8728/ (in Section 4 SCIP’s New MINLP Framework / 4.1 New Expressions Framework)