Missing feature is from

bootstrap-vue

Docs

https://bootstrap-vue.org/docs/components/modal#comp-ref-b-modal-props

Describe the missing feature

footer-tag and header-tag are not implemented in BSVN - they should be added at some point for completeness.

Note that AFAIK this is a minor additive change, so isn’t high priority and not required to release a v1 of the product.