Said it was from Optus and go to a link to avoid further issues.
Link appear to be optus.

Caller: 0405 901 345 - text message

appeared to be a legit message from optus.

Optus - We didnt hear from you. To avoid further issues visit (link that looked legit) to confirm your details.

Message from NAB to say click on a link to avoid further issues with my account. I don’t bank with them

Received a message:

iTunes: We have detected a potential issue and blocked your AppleID. Please visit https://apple.com.submit-user.services to confirm your account details

Caller: 0405 901 345

Also received unsolicited text message saying "The Truth: Please watch an old man in the chair and if you like it, share it. https://www.youtube.com/channel/UCd6F39mg7LPUkw1BfiJDibw/videos"

Channel appears to be a man calling himself Vernon Coleman and has lots of conspiracy-related videos. No idea how he got my number

Caller: 0405 901 345

I received this unsolicited text message (see below). I haven’t clicked on the link to find out what it is as I am wary of unknown numbers. Message is:
The Truth: Please watch an old man in the chair and if you like it, share it. https://www.youtube.com/channel/UCd6F39mg7LPUkw1BfiJDibw/videos