Recording Apps Co-investment on the ILR

That hasn't been in since the 2017/18 rules. It's now just;

P210.3 You must have collected and recorded (on the ILR) at least the amount
of co-investment required for the whole programme up to the month
before the completion payment is due, not counting any co-investment
which might be required for the completion element itself.

The funding rules that apply are based on the rules for the funding year in which the programme started.

From the 20/21 funding rules:

P249 At least every three months you must:

P249.1 have collected the matching co-investment from employers; and

P249.2 report the cash value, on the ILR, of total employer contributions received from the beginning of the apprenticeship to the end of the quarter in June, September, December and March.

21/22 funding rules:

P249 Throughout the financial year you should regularly:

P249.1 have collected the matching co-investment from employers; and

P249.2 report the cash value, on the ILR, of total employer contributions received (see paragraph P247.3).

22/23 funding rules:

P212 Throughout the financial year you should regularly:

P212.1 Have collected the matching co-investment from employers; and

P212.2 Report the cash value, on the ILR, of total employer contributions received (see paragraph P210.3).