Let's look at what you wrote real quick: "according to the girls tiktok they're ignoring the appraisal the daughter sent". In other words, the daughter has allegedly already performed the appraisal, which means the homework was already done and is available. This implies 1 of 2 things:
1. This "appraisal" is unofficial or has very dubious merit, as such the reporter felt prudent to completely ignore it in the article. If this is the case than its pretty understandable why Metrolinx would completely ignore this appraisal when offering their compensation.
2. The reporter was never sent or told that there was an appraisal, which begs the question of why. The simplest and only logical answer of course being that this appraisal doesn't exist, and its something the daughter invented to make her position sound more sympathetic on TikTok.
P.S. You said that the appraisal was sent by "the daughter". Unless you want to claim that this woman gave birth to her when she was in her 60s, this daughter absolutely isn't a "child" - she is a fully grown middle-aged woman. If she has failed to provide proper documentation in time that proves the valuation of the house, that is entirely on her.