I read the article at the time and was glad the MSM were covering the issue.
Alex Bertie still does Instagram and is living with their partner who is also a trans man. Hangs out a lot with Jamie Raines aka Jammie Dodger another successful Youtuber and trans man with a huge following. They definitely keep a much lower social media profile now but still post occasionally.
The last I saw, Alex was still spending lots of time gaming and doing live Twitch streams. They're also a full-time graphic designer. They've got a very luscious beard now - 'The Quest to Beard' was definitely accomplished! Recently they've been very open about being fitted for a hairpiece as they went bald on top and were never seen without a beanie hat as a result. The hairpiece is very convincing and they seem a lot more confident and happier in their photos as a result.
Their former boyfriend Jake now identifies as non-binary and had a stint at Mermaids providing digital content and conducting online video interviews for Mermaids Insta account. They also advertise period products for a company that's very trans friendly - 'it's not just women who have periods' slogans and the like. They were recently critical of how Mermaids handled the closure of their helplines and posted a couple of cryptic messages implying the whole situation hadn't been handled well by Mermaids.
I'd say Alex and Jake were hugely influential on a generation of young girls. Many aspired to have top surgery and T and be in a relationship like Alex and Jake. I remember they were my first introduction to how 'well' the MTF transition could 'look' (on video anyway where the often diminutive stature is not so apparent)
I, like many others I guess, were quite transfixed with the 'this is me 1 month on T, 2 months, 1year etc ...' videos. So I can imagine how appealing and addictive they would have been to any young girl terrified or repulsed by the idea of their own puberty. I know that if I'd seen these videos when I was 13/14 I would have been transfixed. Who knows how they would have fed into my own loathing of being born a girl?