With the Mk4 supra, in Forzavista mode, it shows that it has a manual, but when you drive it around, the shifts aren’t animated so it looks like it has an automatic
Due to risks associated with changing car performance, gameplay behaviors and impact to other players, we are not considering making any changes unless it results into a game-breaking event such as client crashes or heavily disrupting gameplay scenarios.
This issue has been previously noted as a will not fix for Forza Horizon 5 per the known issues articles.
Cars - The 1998 Toyota Supra RZ is missing a gear shift animation (Date Added:11.19.21)