Can my phone and info be hacked into?

It is possible for an iPhone to be hacked.

See these security-related documents..

If you think your Apple ID has been compromised https://support.apple.com/en-us/HT204145.

Security and your Apple ID https://support.apple.com/en-us/HT201303

iCloud security overview  https://support.apple.com/en-us/HT202303

Ways to keep your information safe on Mac https://support.apple.com/en-gb/guide/mac-help/mh11402/mac

Using app-specific passwords https://support.apple.com/en-us/HT204397

Use Two-factor authentication for Apple ID https://support.apple.com/en-us/HT204915

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And, if you can, Check your Apple ID device list (https://support.apple.com/en-us/HT205064) and remove any device that shouldn't be signed in using the steps in the link.

If there are none that shouldn’t be signed in, then you should not have a problem. But, if an unauthorized device is signed in, Change your Apple ID password https://support.apple.com/en-us/HT201355 

Here is What to do after you change your Apple ID or password https://support.apple.com/en-us/HT204071

For Apple support, if you ever think your account has been compromised, use:

Get a call from Apple support to help solve your problem using this link https://getsupport.apple.com/?caller=kbase&PGF=PGF63005&category_id=SC0245&symptom_id=23362

Apple ID Support https://support.apple.com/apple-id

Apple Support Twitter  https://twitter.com/AppleSupport

Apple ID account security for country-specific and region-specific help https://support.apple.com/en-us/HT204169

Get Support: We’re here to help https://getsupport.apple.com/. Go through the options to find the best support option.

As long as your iPhone passcode and Apple ID password are secure (and you use two factor authentication), it is nearly impossible.

Two-factor authentication for Apple ID - Apple Support

(The only reason I say "nearly" is that you can't prove a negative. I think the FBI was able to, but only at great expense and effort which probably required disassembling the iPhone)

Normally, it can't be, unless you gave someone your Apple ID and password. Why do you think you have been hacked?

Link to contact Apple Support in the article.

Apple ID has been compromised.      

Security and your Apple ID.