In most cases, registering on PPSR is of little value when services are provided because, unlike the supply of goods, you cannot re-take possession if you don’t get paid.
For example, if you perform grass cutting duties for a customer you cannot undo the work done or take it back. However, if it has created value, in the form of a debt (eg. your customer has on-sold your service), you have a right to the debt if you have security and register.
Accessii would be happy to explore the benefits of registration with any potential secured party.