Your question is perfectly clear.
As the previous visa expired without your spouse even travelling to the UK, you will have to apply again under the current rules. She would be granted a visa during which she must reside in the UK. At the end of her visa, she would be eligible to apply for Indefinite Leave to Remain.
I hope this answers your questions. If so, kindly rate the answer and provide feedback.
If you have any further questions, please do not hesitate to ask.