Keep in mind that the older GLP-1 medication, liraglutide, is now available as a generic. It might be worth asking your doctor about it, as it could be a more affordable option.
Mag07 is a different mechanism from Miralax - it releases oxygen in the colon which produces a distinct kind of motility response rather than osmotic pulling. Some people who don't respond well to Miralax or psyllium find Mag07 works better for the GLP-1-specific constipation pattern.
MiraLax is the first-line fix most doctors reach for on GLP-1 constipation - the osmotic mechanism draws water into the colon without the cramping that stimulant laxatives can cause, which makes it better for regular use. The 3-4 times a week approach in the OP is a standard maintenance dose rather than only as-needed.
the MiraLax morning and Smooth Move tea at night combination is the one that actually works for most people on GLP-1 where the slowed transit is significant - the osmotic action in the morning plus the senna stimulation overnight covers both the drawing-water-in phase and the motility phase. running both simultaneously beats trying each separately
MiraLAX is genuinely gentle and simple to use. Reached for it occasionally even before MJ started. No stomach cramping, and it's barely noticeable mixed into water. Just knock it back quickly and that's it.