Hoping someone with more knowledge than me can help!

Visa duration and travel
Date of grant 23 May 2023
For first entry, arrive by 23 May 2024
Must not arrive after 23 May 2028
Length of stay 23 May 2028
Travel Multiple entries

We originally travelled to Perth to activate our visa in December 2023. My wife (primary applicant) has a job starting April 28th 2025 and will fly out April 17th and we calculate that she'll complete the three years before the end of the visa so can then apply for the 191 visa.

I will be staying in the UK a little longer to see through the sale of our house here. Will I need to be in Australia before 23rd May 2025 so I complete three years before the end date or do I qualify on the back of her application regardless?

Any help massively appreciated, especially from any migration agent who may be lurking around!!