This page is about reselling: opening your own panel, setting your own prices and taking orders from other people's accounts. If what you need is to promote your own profile, that is a different job and a panel is the wrong tool - buying the services wherever they are cheapest will do.
For a reseller, Instagram behaves nothing like Telegram, and the reason is unit economics. A Telegram member starts at $0.31 per thousand; an Instagram follower starts at $12.00, nearly forty times as much. A customer who arrives carrying Telegram panel prices in their head will baulk at your follower prices, and the way to settle that is not a discount but an explanation: these are different goods with different wholesale costs.
There is an upside to the same fact. Instagram likes and views start at $0.24 and $0.11 per thousand, which makes them the cheapest mass-market goods in the catalogue after Telegram views. They are what builds turnover and the habit of coming back, while followers work as the rare high-ticket purchase. Build the storefront in that order rather than the other way round.