Amelanotic melanoma stage 2

My mum was dx with amelanotic melanoma on her shin. She had an excision but needs to go back for bigger margins. It’s taken a loooong time to heal as it’s in an awkward place. This was around 3/4 months ago. She has only just had an ultrasound on her lymph nodes in the groin with 2 concerning ones.

At no point have they checked the rest of her body or offered or given any scans - is this normal!?

There has been so much waiting even though they described it as aggressive. She’s under the NHS.