I have shoes I do not untie. For example, I have some mocassins for around the house with a rawhide lace that is basically a decoration. But it comes untied!

So for those kinds of things, I use the ian secure knot: https://www.fieggen.com/shoelace/secureknot.htm

Actually, with the rawhide nonsense on one pair, even that would eventually come loose so I zip-tied the middle of the knot. :)