Sharing my experience...
Focus is more on Azure technologies these days.
I used to use SSDT for developing SSIS packages and SSRS reports but gone are those days. Not using it from last few years.
I have seen the projects getting migrated to Azure and to integrate data and orchestrate data pipelines on Azure, we use Azure data factory (SSIS kinda tool on Azure) and to create reports Power BI is used instead of SSRS.
SSDT will always be used to create SSAS or AAS (Azure analysis services) models as this development is not possible on Azure service.
And for sure, projects who can't afford using ADF and who are not using azure services, they will continue to use SSIS for data integration. As long as we have on premise SQL server, SSIS will continue.
Search for future of MSBI, SSIS, SSRS etc. on web and you will few blogs.
Please don't forget to Accept Answer and Up-vote if the response helped -- Vaibhav