I suggest looking a bit wider for sources, particularly ones with more depth than a sound-byte in YouTube clips.
Here is a link to a Sydney Morning Herald (SMH) article from last year. In the article it is quite clear that Navantia made an offer to build three more destroyers for $6 bil.
Elsewhere, DefenceConnect has
this article here, which reference articles originally published in the Australian, but again firmly stating that the proposal came from Navantia (Navantia Australia this time).
I am not linking to the Australian articles because they are entirely behind a paywall.
There is also
this article in the Australian Financial Review, whilst mostly paywalled, one sees that the Spanish PM was expected raise the issue of Navantia's offer to the Australian PM when they met for a bilateral meeting last year prior to Spain hosting a NATO summit.
The first YouTube clip linked mentioned the SEA 4000 project which was the assigned project number for the three
Hobart-class DDG's currently in service with the RAN, but there been no updates to that project on the Defence site to indicate plans to order three additional destroyers. The clip also stated that the Australian government asked Navantia to 'step up' it's offer to build three more Air Warfare Destroyers. Now I am not particularly familiar with the Global Defence Corp YouTube channel, but it seems to be one that makes AI-generated YouTube content by scraping the internet for articles of defence news, then making a video clip collection related to some of what it has scraped together. One of the problems with using something like this as a source is that much (sometimes everything) is lost in terms of context. In the case of this specific video, it seemed to largely overlook that the offer for three additional destroyers came from Navantia.
The second YouTube clip never even mentioned who made the offer or request for three additional destroyers for the RAN.
Now one might be asking by now why I am placing so much emphasis and importance on who (which entity) made the offer or request. From my POV the origin of the offer or request is very important. The reasoning behind this belief on the importance is that if the origin was the RAN, by putting in a request to industry, that would indicate that the RAN wants/needs and is planning on adding additional vessels to the fleet. OTOH if the origin was Navantia, with an offer to build more warships, then such an offer made has nothing to do with what the RAN and AusGov is planning. In other words, Navantia made an offer which Australia might be completely disinterested in.
As a side note, it might be worth looking back in this thread to around when the offer was made, June/July of 2022, as I recall we had a bit of discussion on the topic here on DT at the time. One thing I remember being struck by at the time, was that the offer sounded a bit questionable at the time, due in large measure to claims made by Navantia on the costs, as well as how quickly the offer could be delivered, particularly given how long the lead times were/are for some of the kit.
EDIT:
Here is a link to where discussion of the Navantia offer first took place on this thread in July 2022, which also includes a link to the Age article mentioning Navantia's offer.