Regarding your question.
As of now (this may change by the end of 2022) there are no patent which you can obtain which is valid in all European countries. You need to file for identical patents in each jurisdiction of interest (e.g., France, Germany, Italy, Spain, etc.). In this context you may contact lawyers or Patent Attorneys in each of these jurisdictions and proceed forward, though it is quite expensive and time consuming.
As mentioned in the previous answer, an alternative exists. The European Patent Office ("EPO"), which is an organization with more than 50 European member states (UK included - even after Brexit) provides for a "bulk filing" of patents. When an "EP" patent request is filed, the EPO will process and examine the request in order to assess the patentability of the invention at stake. Once the patentability has been confirmed (which can take several years, especially if competitors oppose your request) an EP patent is delivered which allows you to get a corresponding "family of" patents in all jurisdictions of interest.
In order to file for an EP patent, you may contact a professional representative or "mandataire agréé" (in French).
Alternatively, if you still need some help please contact me. I can help you address some preliminary issues regarding patentability and use my network of Patent Attorneys to guide you towards the drafting and filing of the patent.