For a first page, this is definitely not bad! the use of the Backrooms worldbuilding with groups and objects shows that you have a good grasp of the wiki universe and that you know how to use it effectively, which is good to see on a wiki that doesn't tend to use its own lore. Here, it makes the page feel more alive and cohesive in the wider universe, which is a really great plus for it. Having Robopets being used was definitely not something I expected, yet the attempt was successful, although some theories about the presence of the Backrooms Robotics work being here could have been explored.
The overall gimmick of the level is well put. You don't spend too much time on the generalities, like the level's structure or weather properties (although some parts of the level don't seem to have a purpose still, other than being landscape pieces), which allows for a good focus on the actual page concept. The radio, messages, objects and base are all quite interesting and intriguing and seem to lead to a cohesive mystery that I liked to wonder about.
About the stuff you could have done better, the developped story of Amalia and the outpost of the level would have been pretty welcome here. Having the context of the start of the discovery, the exploration and the start of the settlement, with more development about their survival outside of the event of the screams that broke the group apart would have allowed this section to feel more interesting, as you skim over it a lot, even though it could have conveyed the mystery just as well. Their base would have felt more real and useful if it was used more in the background. As I explained earlier, the presence of the work of Backrooms Robotics could have been developped more into a full-on possible clue, instead of simply feeling like a needed mention to justify those objects being here without a logical reason. The use of pure clinical also set back the potential, as you could have used more variations like logs, narrative recordings dealing with the mindset of the outpost members regarding the mystery as they discover the level, or even blocks from other groups that could exploit the information got from the level, giving answers in the form of theories or development, as well as starting new questions.
But overall, I see what you wanted to do here, and I definitely have my theories trying to use everything you gave. Small sentences and big parts seem to have their role to play here, so I really like how you seem to have planned the global story. So overall that's a great first page. Congrats and keep it up!