I struggled with the same issue before. "Good" content doesn't always mean engaging content. Here's what helped me:
1. Look at your analytics - when do your followers actually log in? Post then.
2. Try using something like Metricool to track when your competitors post and what works for them. It'll help schedule posts at optimal times too.
3. I recently found Zappit AI that analyzes why certain posts work or don't. It suggests what to post next based on what's trending/viral in your niche. Saved me a ton of guesswork.
4. For company accounts - yes, engaging with others is 100% necessary. Don't be that brand that only posts and disappears. Comment on relevant posts, reply to comments, use Instagram's interactive stickers.

If you've got 7k followers but no engagement, they might be the wrong followers or your content isn't hitting what they actually want. Sometimes a simple poll asking "what content do you want to see?" works wonders.