As a standard, when you update your default application process, this will appear on new vacancies.
If a default application process isn’t pulling through to new vacancies, this could be in relation to the language you have selected when updating or creating the application process;
You need to ensure that the default application form sits against English (UK).
If you find a specific user is experiencing this issue, it could be that they are logged on to the system as English (US) rather than English (UK) which could be having an effect.
Also, ensure that the application process hasn’t been updated by another user on a job level.