Is there any way to make a relational DB like thing in excel?

For context, my work involves maintaining a lot of excel trackers. Basically we maintain these to track project details for a client like project deliverables, project codes (for employee clock-ins), project milestones, project assigned to PMs or not, etc - all in different excel files. This might sound like simple info, but we capture a lot of details related to project in all those files - like the main tracker will have bascially columns for capturing info from every section of the contract signed with client. The clock-in codes tracker will have its name, parent account ID, clock-in category, project ID, and a few other columns. Just adding one project's details to all trackers takes about 30-50 mins right now (depending on complexity and category of the project). However, maintaining multiple files leads to a lot of duplication effort - basically you add name of the project, project ID, PM name etc so many times. Anyway this can be changed? Like we add all data in one sheet and maybe pull it into different views for different purposes? I have done some research with gpt and on youtube, but they suggest going the power apps/ power BI way, but I am not too well-versed with those. And I was thinking if there is another solution that can be done in excel itself? Or if power BI is the way, then maybe can you guide me to a starting point for that? Thanks in advance.