Well for example, Sacred Tradition includes such things as the prayers and liturgies of The Church. For example the Old Apostles Creed is the precursor to our current Apostle’s Creed and the Nicene Creed. Because it was tradition there is not a lot of written evidence to prove this all the way back to apostolic times but we do have artifacts that extend to 2nd century men who were direct successors of the apostle’s or their disciples and the inspiration is clearly apostolic.
The various rites used in the early church are other traditions (e.g. burial rites, ordination rites, early church liturgy). The burial traditions are manifest in the art-forms and markings of early Christian catacombs which prove that the early church believed in purgatory and had reverence for Mary in particular. The traditions of how Judaism was modified and adopted for gentile Christians is part of too and we see this in other works such as the
Didache. Again rituals and rites were used by the early Christians and these were mostly propagated by tradition.
The apostolic succession itself is a tradition. There are certainly cases of it mentioned in the bible (e.g. when Mathias replaces Judas and the laying on of hands of other apostolic successors). But we don’t see explicit instructions in the bible for “how to forgive sins” or “how to baptised” or “how to bury the dead” or “how to ordain new apostolic successors” or “how to give 3 different ecclesial-spiritual ranks of bishop, priest and deacon” (which have unique specific authorities and limits). We don’t see any mention in the bible of “what must one do to repent and do penance” - yet we know the early church did these things.
James