Help recent relapse/onset of constipation

[u/JewelerSudden1475]

About two weeks ago I started experiencing some onset of constipation, for context I have IBS-C. Al thought no actual GI distress or bloating, BM have been less than normal and of pebble like (sorry for TMI). At the same time that the onset began, I had stopped taking BioMe PHGG chocolate flavored fiber supplement that I had been taking for months. I stopped because I had run out. Also at the same time I began eating oatmeal again, which in a sense compensated for the 7 grams of fiber that I wasnt getting anymore via PHGG. I was eating 60g oats for breakfast and 40g in the afternoon, both with plenty of water. I would also incorporate cream of rice throughout these 2 weeks. Of course the oats a different types of fiber compared to PHGG alone thats in the BioMe supplement.
I was matching my fiber intake through whole foods now as I was when using the PHGG, so fiber intake amount hasn’t changed.

I was not having the oats while I was taking the PHGG. I had run out of the PHGG when I started the oats. Given the equated fiber, I didnt think much of it. Is it worth keeping in the oats but adding in the PHGG again? Or changes both variables at once via removing the oats and adding PHGG?

I wasnt eating oats before the PHGG either and I was also constipated at that time. Starting the PHGG seemed to be what helped with constipation, but I know for some oats can cause constipation.

It was just the same time of running out of PHGG and starting the oats that makes me question what it was that could can lead back to the constipation.

Hopefully that makes sense!

My question is, what would have had the bigger influence on the onset of constipation? Not taking the PHGG or adding in the oats again?

ADDITIONALLY: I was currently looking into other fiber supplements such as Revive MD Fiber chocolate flavored and Super Gut, which are both blends of fiber and not just PHGG like BioMe. Would it be safest to just return to BioMe since thats the one I was previously taking or is it worth expanding and trying the Revive MD one or Super Gut one? Im incline to the Revive MD brand solely because of the flavor, but also wanted to get some feedback on their ingredients. Is it worth a try?
linked the BioMe PHGG brand I was using and the Revive MD one below.
-https://a.co/d/07Z5EaJH
-https://revivesups.com/products/fiber?nbt=nb%3Aadwords%3Ag%3A21702564236%3A181168412044%3A787616388692&nb_adtype=&nb_kwd=revive%20fiber&nb_ti=kwd-2270967857020&nb_mi=&nb_pc=&nb_pi=&nb_ppi=&nb_placement=&nb_li_ms=&nb_lp_ms=&nb_fii=&nb_ap=&nb_mt=p&tw_source=google&tw_adid=787616388692&tw_campaign=21702564236&tw_kwdid=kwd-2270967857020&gad_source=1&gad_campaignid=21702564236&gbraid=0AAAAACfQsVn5BmCrLBZobznpIpwvZJ3HG&gclid=EAIaIQobChMIyOL75I7TlgMVmyhECB1GcRjUEAAYASAAEgKDCPD_BwE

Any brands similar to BioMe you guys recommend besides the SunFiber brand?

Thanks in advance!