sales_order table - increment_id doesn't match entity_id

increment_id and entity_id are two different elements at magento2.

entity_id is the primary key of the table which auto increment.

Where increment_id an unique identifier of an order which using build on some logic.

Like

Prefix
Suffix
Step
Start-value
Pad-length

That it logic is build at Magento_SalesSequence module. Please check more detail at https://www.classyllama.com/blog/m2-incrementid