I’ve been getting quite a few questions about my Instagram feed. I use the tiling method and I actually did a blog post on it for the Preview App a while back. You can find that article and step by step video here: https://thepreviewapp.com/perfectly-split-instagram-grid-4-easy-steps-twigyposts/
You can purchase the same Lightroom templates I use to create my tiles here: Create Instagram Tiles in Lightroom
Hope this helps!! Have you tried the tiling method? If so, what did you think?