Yes. You can very well do it. You just need to give JEE mains paper 2 or NATA to get into several government or private architecture colleges. You will have to restart from architecture diploma or based on your 12tg and NATA score.
This will take extra years of your life and take longer to get a good job.
Another way to get into architecture after completion of civil diploma is to go for architecture engineering. The candidates who have completed diploma in civil engineering are eligible for the architecture engineering course through the lateral entry scheme offered by the Engineering colleges in India. Some Institutes can also ask you to appear in Lateral Entry Engineering Test (LEET).

You can refer to the following article and gain knowledge on architecture engineering and colleges.
. https://dqxeclau.top/courses/architecture-engineering-course#:~:text=Also%20known%20as%20building%20engineering,of%20social%20and%20environmental%20issues%2C

https://engineering.careers360.com/colleges/list-of-architecture-engineering-colleges-in-india

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