What's the best way to paginate through entries from an entries field type?
To do this, you would need to use getPrev() and getNext() on the related entries’ template.

The trick is telling getPrev() and getNext() to use the order you defined in the source entry’s Entries field.

So first, you will need to get that source entry. If you only have a single entry in your structure section that has one of these Entries fields, that could be as simple as this:

{# Get the entry in the structure section that relates to `entry` %}
{% set sourceEntry = craft.entries.section('myStructureSection').relatedTo({
    targetElement: entry,
    field: 'myEntriesField'
}) %}


Once you have that, you can just pass its Entries field into getPrev() and getNext():

{% set prevEntry = entry.getPrev(sourceEntry.myEntriesField) %}
{% set nextEntry = entry.getNext(sourceEntry.myEntriesField) %}

{% if prevEntry %}
    &lt;a href="{{ prevEntry.url }}"&gt;Previous: {{ prevEntry.title }}&lt;/a&gt;
{% endif %}

{% if nextEntry %}
    &lt;a href="{{ nextEntry.url }}"&gt;Next: {{ nextEntry.title }}&lt;/a&gt;
{% endif %}