Yes, and the reasoning behind it is worth understanding clearly so the situation makes sense even if it does not feel fair.
Probation was the court's act of generosity. Rather than sending your daughter directly to jail or prison to serve her sentence, the judge gave her the opportunity to complete that time in the community under supervision. That is the deal probation represents, serve your sentence without being incarcerated as long as you follow the conditions.
When the conditions were not met and she did not complete the required probation days, she broke that agreement. The court's response to a broken agreement is to remove the leniency that created it. The 240 days being imposed now is not a new punishment. It is the original sentence that was already owed, now being collected because the alternative arrangement did not work out.
There is no secondary pathway to early release or reduced time when the sentence itself is the result of a probation revocation. She has exhausted the early release option, which was the probation. What is left is the time.
The most useful thing she can do with those 240 days is keep her record spotless inside. No write-ups, no infractions, cooperative with staff, engaged with whatever programming is available. That conduct will not shorten the 240 days but it will position her well for whatever comes after, and it makes the time more manageable in ways that cause problems for no one including herself.
Stay in contact through letters and calls during this stretch. Consistent outside connection makes a difference.