How to change custom paginated URLs using PHP code

See our website has pagination URls like below

1. https://www.xxxxxxxx.com/xxxxxxxx/yyyy/zzz/?xx_xxx_page=2
2. https://www.xxxxxxxx.com/xxxxxxxx/yyyy/zzz/?xx_xxx_page=3
3. https://www.xxxxxxxx.com/xxxxxxxx/yyyy/zzz/?xx_xxx_page=4

ISSUE: These pagination URLs are not indexing by Google. (As it has showing same canonical URL for all these pagination URLS , it showing error as Duplicate URL)

Proposed solution: we want to create all these pagination pages separately with Specific permalink(URL). Without changing URL Structure and without disturbing Pagination

1. https://www.xxxxxxxx.com/xxxxxx/yyyy/zzz-2/
2. https://www.xxxxxxxx.com/xxxxxx/yyyy/zzz-3/

Any one please help me with fasible solutions.

Thank you