HP Pavilion laptops are bad as well. Dell is not good either, but that is the case with all budget laptops. Jarrod reviewed HP pavilion gaming, check that.
4600H vs 5600H doesn't matter for gaming much. The jump in GPU will overcompensate & Jarrod has good fps number & comparisons with other laptops. I see no reason for a gamer to pick 5600H + 1650 laptop over 4600H + 5600M.
2.5" drives can be HDD or SSD. Jarrod was talking about M.2 SSD slots & that 2nd M.2 slot will be unusable with 2.5" drive installed.
FK has wrong specs at times, so 14.96" is a typo, such panel size is not made by any panel manufacturer. People have confirmed that it is a 120Hz panel that too with freesync in 60-120Hz range (search in google what freesync is, watch some videos, nice to have feature).
Dual channel RAM (2 sticks of RAM) provide some performance advantage over a single stick, noticeable with game fps. Again Jarrod has a video on that, look it up (single channel vs dual channel RAM).
I attached 2nd video to specifically address the thermals. Also recommended using a cooling pad or laptop stand. Disable CPU turbo boost, if needed. You are buying a budget gaming laptop, it will have some issues, heck more expensive laptops also have some sacrifices. No perfect laptop. Beware, you will have to spend time optimizing it. If this seems like a pain, get 1650 or 5500M Victus & live with that.
Ideally, I will recommend increasing the budget to 72k for HP Victus with R5 5600H + 3050Ti + 8GB RAM & adding 2nd 8GB RAM later. Else, live with that Dell G15 SE, keep its temps in check, enjoy gaming on it.
Also, I will blindly not trust any salesmen, most are liars. Some might be good, but yet to experience one, I mean it is their job.