fyi everything gets converted to TrimBim, also when imported inside Tekla Structures. The challegne with rvt files is that is chooses which view to show and convert, there is no single view this is done. So content and presentation depends on the views...there is somewhere more documentation about it, but if rvt project has "Publish" view in it, then that is used for conversion.
In Trimble Connect, you can save models directly into Trimbim, and export whole view into Trimbim. trb is valid ref object in Tekla Structures since 2021. But that is not something you can convert into Tekla parts.
Always best and easiest to get rvt exported to IFC.