... Ask yourself this, if a fifth generation fighter jet has stealth protection, than why are your magical voodoo woo-woo Russian 7th generation jets completely unstealthy?
I don't know anything about these 7th generation jets, but want to point out that there was an a-symmetrical requirement / need in the cold war era between the USSR and the US requirements for fighter jets.
The US jets were to assist the SAC bomber penetrate deep into the USSR.* Thus the US jets needed to be as stealthy as they could be against the mono-static radars of the USSR's jets looking for them.
The modern stealthy US jets are NOT stealthy against bi-static radars, they "shine brightly" (strongly reflect radar waves) when any of their flat surfaces acts like low reflectivity mirrors sending the transmitted beam straight to the not co-located receiver. This is why the USSR built about 6 huge powerful radar transmitters (antennas taller than 10 story buildings) and dozens of receiving stations
for each in bi-static radar nets. Their idea was to vector their defensive fighter jets to the invading SAC bomber before the SAC bomber could get anywhere near Moscow etc. Speed was their jets main requirement.
The USSR jets were never intended (They lacked both the range and aircraft carriers to take off from) to penetrate the US mainland.
*One summer, I worked on a SAC bomber penetration aid under contract QRC 65. (QRC stood for Quick Reaction Contract - money was unlimited as SAC wanted the jammer we were building yesterday - and we delivered the first prototype in three months just as I was returning to Cornell!) I was the first person hired by the tiny company (CGS labs) with the new SAC funds (three times more than the company's total prior sales!) CGS labs had a unique "incroductor" with high power capacity. It was and RF coil on ferrite but that core also had a DC winding which could be used to change the inductance of that RF coil in ms by partially saturating the ferrite. Thus, as the tuned circuit or "tank coil" of a receiver and computer** controlled transmitter, our jammer could jam about a dozen USSR fighters trying to talk to each other as they closed on the SAC bomber. (Say broadcast a 0.07 sec noise burst on each frequency the USSR jets were using and with power enough to saturate their receivers for at least a second after the burst was over.)
My job was a simple part - the system's power supplies and wiring harnesses, but the system was not yet designed! Some of the Mil-spec wires we might need had nearly a months delivery delay. I asked my boss, what should I do, explaining that I don't know what lengths or wire sizes will be needed. He said: order at least a mile of all we could possible use* (QRC-65 was a cost plus contract) so I did. Many thousands of dollars worth, 99% of which just ended up in the company's stock room.
*This for one small (about a foot tall in a standard SAC rack} but heavy prototype - The weight being mainly ferrite and copper - I could barely lift it.
** The computer was made from / with those tiny two-pin neon bulbs. They have two stable states. I think because transistors were relative new and SAC feared they could be burned out by USSR's powerful ground based radars "painting" a SAC bomber with mega-watt beams, but I am not sure of that.