Dealing with this myself atm. The 10 days pay is set in stone, but it can be split up.
Case in point I was out 5 workingnfays last year with a negative test(was before rapid tests were a thing). I now have a possitive case and my BA and Stewart says I'm still able to.get the other 5 days of pay.
On a side note the lady on the 1800 number said that the company is reviewing the emergency pay with the delta variant. So there might be more pay coming in the future. Hope this helps.