Please note that you wrote to the ResearchGate (RG) community, not to the RG team. However, I doubt that the team is able to return these publications to your profile. But I am sure that these were not completely removed from RG, but are still there, just no longer connected to your profile. Here are three methods to find them and to claim authorship (see also "How do I confirm authorship of my publications to add them to my profile?" in https://help.researchgate.net/hc/en-us/articles/14293005132305-How-to-add-research):

1. Open https://www.researchgate.net/profile/Helen-Olsson/unconfirmed (visible only to you). There may be a list of publications for which you may claim authorship, provided these are yours.

2. Search for the titles of your missing papers at https://www.researchgate.net/search.Search.html?query=&type=publication.

3. Search for your name or for the titles of your missing papers at Google, adding site:researchgate.net, e.g.: https://www.google.com/search?q=%22Helen+Olsson%22+site:researchgate.net

By the way, there seems to be a second profile for you at RG, without any publications, but with 19 followers: https://www.researchgate.net/profile/Helen-Olsson-2

See this instruction how to merge duplicate profiles: https://help.researchgate.net/hc/en-us/articles/14292803187473

Here are examples of publications that are possibly by you but that are not attached to your profile (i.e. not yet claimed by you):

https://www.researchgate.net/scientific-contributions/Helen-Olsson-2226444995

https://www.researchgate.net/scientific-contributions/Helen-Olsson-2276400920

And a last hint: It happens that the list of authors given in RG is not complete or that publications were attributed by an automated algorithm to another author with a similar name. See https://help.researchgate.net/hc/en-us/articles/14292798510993-Authorship for various cases and what to do. To find such cases, search for the titles of the missing publications as I described earlier.