Alright, just wanted to make sure that someone doesn't think 'okay, it spits out only xpriv, then let's try that instead' 
It should include the public key or addresses if you use the command dumpwallet
Here's the sample of dumpwallet testnet result
Quote
# Wallet dump created by Bitcoin v0.21.0
# * Created on 2021-01-21T16:59:50Z
# * Best block at time of backup was 1905234 (00000000e26170d0f846a334a1bfdfebe8da906c5),
# mined on 2021-01-21T17:05:05Z
# extended private masterkey: tpR2efnJMh85ufpQcYSTwrrKrYJ
cTdH4SbvTR 1970-01-01T00:00:01Z label= # addr=mnb8RSpTqvhLh8Q6,2MudYFE2awqc,tbvhpur8zf35ql3yx5h9nu
cRaKzuR9MCVwAxVa3aAZrVh15YbV 2019-08-26T01:19:00Z reserve=1 # addr=tb1q3qc52q hdkeypath=m/0'/0'/222'
cT2ozo5xcj6iCe4dTfywan3qJnib 2019-08-26T01:19:00Z hdseed=1 # addr=tb1qzqtu25qsue0a5pp3hg8lkftclf8ds
cNb2K9tUhQaeXiVz2Jt2Wq9DMLdf 2019-08-26T01:19:00Z reserve=1 # addr=tb14d7lx hdkeypath=m/0'/0'/117'
.....4040 lines
# End of dump
Source: https://bitcoin.stackexchange.com/questions/101767/dumpwallet-output-documentation-explanation# * Created on 2021-01-21T16:59:50Z
# * Best block at time of backup was 1905234 (00000000e26170d0f846a334a1bfdfebe8da906c5),
# mined on 2021-01-21T17:05:05Z
# extended private masterkey: tpR2efnJMh85ufpQcYSTwrrKrYJ
cTdH4SbvTR 1970-01-01T00:00:01Z label= # addr=mnb8RSpTqvhLh8Q6,2MudYFE2awqc,tbvhpur8zf35ql3yx5h9nu
cRaKzuR9MCVwAxVa3aAZrVh15YbV 2019-08-26T01:19:00Z reserve=1 # addr=tb1q3qc52q hdkeypath=m/0'/0'/222'
cT2ozo5xcj6iCe4dTfywan3qJnib 2019-08-26T01:19:00Z hdseed=1 # addr=tb1qzqtu25qsue0a5pp3hg8lkftclf8ds
cNb2K9tUhQaeXiVz2Jt2Wq9DMLdf 2019-08-26T01:19:00Z reserve=1 # addr=tb14d7lx hdkeypath=m/0'/0'/117'
.....4040 lines
# End of dump
under addr= should be the public key.
If OP e.g. wants to extract xpub to watch Core wallets on a mobile Bitcoin app, please don't try to now transfer xpriv to your phone or other insecure system in any way or form...