Technical support engineers help in resolving technical issues within different components of computer systems, such as software, hardware, and other network-related IT related problems. When a fresher joins as a support engineer, he/she learns various aspects of technology related problems let it be clearing doubts, meeting with clients, fixing problems. They are highly skilled after with few years of experience, but in a single domain
The average salary of a technical support engineer varies from 4 LPA to 9 LPA depending on the technology and company. So overall technical support engineers skill up in several domains depending on the project or work. A fresher as a support engineer would have a lot of growth and can later change to a different path as there are a number of technical jobs available to them.
So overall, I would say there is clear growth in your career depending on the tools ot technology you are specialized in for later career change