Mumsnet is the wrong place to ask about this, OP. There’s such a lot of ableism on here. MN hates ND people, hates people claiming PIP, and hates anyone who finds driving difficult.
My job was PIP tribunals. Most posters here know nothing about the law or eligibility.
You don’t need to report either of those changes. They are not changes in her health conditions. However, if you are completing a review, rather than a change of circumstances, you will likely be asked about these things during assessment.
Answer honestly, making sure you outline the support your dd needs to do these things.
The mobility criteria includes ‘needs support to navigate the route of a familiar / unfamiliar journey’. This includes managing things such as diversions, delays and unexpected changes. It also encompasses needing someone with her, or on the end of the phone. It includes needing support on the end of the phone. If she has needed help with these things or been unable to complete journeys etc detail this too. If she can’t manage driving on a daily basis say this too. If planning the route takes her longer or requires support, this also matters.
Work - also detail the support needed. Does she have Access to Work support or adjustments in place, etc?