How can I transfer the numbers from my old Android phone onto my new iPhone if I lost the old Android phone?

I was able to accomplish this on my iphone through google.

1. I went into the Settings App of my iphone


2. Went into the Passwords & Accounts section, and hit the Add Account button which allowed me to add my google account,


3. A screen popped up which let me choose what to pull over (mail, contacts, calendars). Via this method, i was able to update my phone with all my old contacts.

I was able to do this because android had either auto-backed up my contacts through one of my google apps, or because i had initiated that process manually in the past (don't remember which).