Since your daughter doesn’t need the credit to reduce her own tax (as she owes $0), the "unused" portion of the credit can be transferred to a supporting parent. Yes, you absolutely can claim it as a parent. Since she has no income and you are the one supporting her, this is the standard way the CRA expects you to file.
To transfer the Disability Tax Credit (DTC) from your child, refer to this TurboTax article for step-by-step instructions:
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