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Here is the recipe for making toilet cleaning tablets: https://www.getgreenbewell.com/homemade-toilet-bowel-cleaner-tablets/
I've made these before and they work well: https://www.youtube.com/watch?v=fgWw_cGf51M
Here's another one from another Hometalk member. I've tried these and they work good. I need to make another batch soon. :) Wishing you the best.
I wrote a post on this that can help = https://chascrazycreations.com/how-to-make-bathrooms-smell-good/
You can just pour coke in the toilet too.
Here are some ideas: https://www.hometalk.com/search/posts?filter=toilet%20cleaning%20