I can't use LinkedIn app with my iPhone 6

Good day! I am using an iPhone 6 and the LinkedIn app, and now I cannot log into the app because a new version of the app is required with support for IOS 13.0, but my current iPhone 6 model does not support IOS 13.0 There is a mobile LinkedIn site, but not all resources are there that is in the mobile application and it is impossible to work there, but I need this application, because I search and work through this application. The question is, how can I continue to use the app if I cannot enter it due to a new update that my phone does not support? I cannot buy a new phone because of the application and I do not have the means for this. It feels like discrimination forcing me to change my phone, which I can't afford right now. What should I do and what should I do with this application? I hope for your understanding and answer on this issue.

[Edited by Moderator]