Yes, but for different reasons. The HOLEP, to my understanding, does not remove the capsule which could be intact or broken, thereby releasing cancerous cells. You need to have that addressed.
Also, if you go the HOLEP route, the remaining prostate tissue is cancerous and must be removed by “morcellating” it, which is the grinding up and suctioning out of tissue - NOT a good idea! In fact, you do not mention when this G3+4 was discovered. If they analyzed ground up bits of gland from the procedure and found them to be cancerous that could be an issue. HOLEP guidelines say to tell your doctor if you have/had prostate cancer (not your job - they should know!).
Morcellation should only be used when no cancer is present. So please do not pursue this option!
First, you need a PSMA to see if there is any spread. Ben’s suggestion for MRIdian is excellent if the disease is still confined to the gland and capsule is intact; you may also consider surgical removal where lymph glands can be analyzed for spread.
Depending on what is found you may need radiation as well. G3+4 in itself is not super bad but if it got out of the gland due to your HOLEP it will need to be treated peripherally as well.
I tell you this because I had Green Light Laser - which uses no morellation - and never had a biopsy first. My PSA was not terribly high and my DRE was completely normal. However, a few years later when my Biopsy revealed G4+3 unfavorable my surgeon said I probably SHOULD have had a biopsy in lieu of the laser surgery (different doc) since the cancer was probably there already and only got worse even though my urination improved greatly after the procedure.
So please get as much info as you can and consult with different docs - surgeons, radiation oncologists - before you move forward. Best
Phil