When processing periods in UK Payroll, the EPS submission will be sent on the 14th the follow month. For example if your pay date is 30th January, the EPS won’t be sent until the 14th February.
You can track the status of your EPS submissions in the software through HMRC Documents > Employer Payment Summary (EPS), here it will display all submissions and inform you if this has been sent:

If the EPS submission fails, you should receive an email from HMRC stating the reason and we can assist our side to get any issues resolved and resubmit the EPS. If you need any EPS submissions sent before the 14th of the following month this will need to be done by written request through our ticketing system.