Reinstall Google maps

Perhaps some ideas on how to install Google Maps might be

found among Search results, covered in duckduckgo links?

https://duckduckgo.com/?t=ftsa&q=how+to+install+google+maps+on+iPhone&ia=web

[This search link also shows/tells of various other things you

may do to get and use Google Maps; including offline Maps.]

Another thought may be to visit Google Accounts, that is the

main portal all Gmail user activities online; & effect settings..

(This may simply show you ~ and offer direct links to get it.)

Unless your iPhone's iOS and ability run supported versions

has Expired, the App Store link may be adequate. Or you may

need to restart the iPhone after force quit; this maybe helpful.

‎Google Maps on the App Store

https://apps.apple.com/us/app/google-maps/id585027354

Other issues may result from an iPhone not being updated to

the last supported version that Google Maps could use. Also

this is unlikely.. If your iPhone runs iOS 15.8.2 or newer; or had

newest version and updated that satisfactorily, it should just Go.

System & Browser Requirements for Google Map - iPhone & iPad - Google Maps Help

https://support.google.com/maps/answer/3096703?hl=en&co=GENIE.Platform%3DiOS&sjid=10178947521727427822-NC

[You may also look into 'Apple Maps' from their App Store, that should be a fair alternative.]

Just re-download it from the App Store.

What issue are you having exactly?

Why not?

What happens when you try?

You need to explain the problem if you want any help.