It's a common situation when a company's Instagram account appears before the company itself. However, this is not always the key to success and active sales. Let's figure out why your followers only monitor your account but don't become customers.
Not the target audience. The amount of followers can be big but it was gained by cheating, low-quality mass following, or after giveaways. And most likely the post insights are not impressive. People simply don't see you in their feed.
Your texts are not for your audience. It's very common in beauty industry profiles. The followers are the same beauty masters, not potential customers.
You simply are not trying to sell. People are relaxing and having fun on Instagram. They are just not in the mood to buy and will not think out what and to whom you are offering. Are you a photographer and post photos without any information about your services? Nobody will guess what you are selling this way! This is NOT obvious to them. Post about it and remind about yourself.
You are not explaining the benefits. Selling text is not just using words "product", "price", "buy". This is about the ability to convey the benefits of cooperation with you. Tell them why they should buy from you and not from your competitors. About your experience and knowledge. Convince them that they need it.
Create a need. Previously, marketing was about studying the needs of the market. Now it's about CREATING needs and selling goods/services for them. For example, people do not know that they need to visit a cosmetologist regularly, even if there are no serious problems.
"We sent you the cost in DM". Forget about such answers! Improve customer service, give customers more open information. Add more photos, tell in detail about the product. Or don't you need clients?
There is no novelty. The audience burns out, their tastes and interests are changing, or everything has already been bought. Carefully work out your product line and constantly add to it something new. Then the clients will reach out.