how to add quantities to a long term portfolio??

Soo guys I created a portfolio in 2021 and now it has given good returns , now I wanna make this portfolio big as Now I earn and have money saved. How can I do soo? these are the stocks I have invested in. Pls let me know a systematic way to invest also this was a buy and forget potfolio and now I dont even know why I bought these then and havent been touch with any of the news regarding the stocks.

https://preview.redd.it/65itepobuvkg1.png?width=430&format=png&auto=webp&s=d52cf50ec2b72ef10124e1a3dadeace3854867c2