Not sure if you mean can you skip the progesterone just this week/month while you are bleeding, or longer term (because you think you are still having natural periods.)
When you say you are 'still having a bleed' what do you mean?
One bleed after 2 months, or 2 bleeds one month apart?
First, you do have to use some progesterone with HRT, for the reasons you know. You can't use just estrogen long term.
The bleed you are having now may be a period OR it could be a spontaneous shedding of the lining as it's become too thick (because 100mcg patch is a high dose.)
If it's spontaneous shedding (and you haven't ovulated) then that's a sign that the lining has become too thick.
For women who are intolerant to all progestogens, they can have the option under medical supervision to extend the estrogen-only part of the cycle. There is also a tablet form on HRT called Tridestra which is a 3-month cycle and can suit women in peri. (It gives a bleed every 12th week.)
However, you really do need to do any of this with medical advice.
Specialists can prescribe and monitor longer cycles (for example 6 or 8 week cycles instead of the usual 4 weeks.)
But this usually means you will monitor the lining, maybe every year, with a scan and this is often privately, because the NHS won't usually offer these scans purely as 'check ups' unless an NHS specialist is asking for that.
Sorry it's such a long answer. You should keep using progestogens, and if you need or want to move away from the 4-week cycles, you are probably going to have to see a private menopause specialist who can authorise it and can monitor it all for you.