We tend to focus far more on things and people that were distinctly Welsh as opposed to things that simply had a shared Brittonic heritage. It’s not exactly clear when that distinction first started occurring, but very unlikely to have been present at her time. So we dont really revere her very much, and certainly don’t claim her.
I dot find the reverence of her in England to be interesting though given my earlier point that you cannot start the English story any earlier than the Anglo Saxon migrations, something that occurred hundred of years after her time. Simply put, she is not one them either. From what I’ve read this is a fairly recent perspective, mostly based on a form of pro-Victoria propaganda, reimagining Victoria as this warrior queen reborn.
