The A record is your default ipv4 address for the domain. You can test this stuff yourself instead of posting here. Open a DOS/CMD prompt in either Windows or Linux and type nslookup
To check your mail exchanger you do:
> set type=mx
Your mail records look fine. I am getting:
peteandlynnekane.com MX preference = 10, mail exchanger = mx01.ionos.co.uk
peteandlynnekane.com MX preference = 10, mail exchanger = mx00.ionos.co.uk
To check your name servers you do:
> set type=ns
This looks fine too. I am getting:
peteandlynnekane.com nameserver = ns1103.ui-dns.org
peteandlynnekane.com nameserver = ns1094.ui-dns.com
peteandlynnekane.com nameserver = ns1047.ui-dns.de
peteandlynnekane.com nameserver = ns1070.ui-dns.biz
Here is where the problem is:
> set type=A
Your default ipv4 address is blank.
> set type=AAAA
Your AAAA (ipv6 record) is blank too. But that's probably normal.
Your web host should provide an interface for modifying your DNS records. If not then you need to contact whoever is responsible for managing the DNS records.
> set type=soa
According to your DNS entry... ns1103.ui-dns.org is the authority.
This looks like a good place to start:
Default DNS Settings for IONOS Domains[^]