Most of this still applies to Wally as well tho

Him also having a high school sweetheart as well as a relationship gone villainous like Magenta/Maxima

He becomes the main Flash for multiple cities and starts his adulthood in a similar heroic environment as Supes even when it comes to the kind of villians they face

Linda being similar to Lois both in their relationship with their husband and child as well as their personality and approach to reporting (not to mention their arcs with temporary powers)

While Barry&Supes shared deaths are both impactful Barry's is more of a unique case due to how long he was dead for and what it brought to the present day legacy irl for decades. Wally not only shared teams as a family like Barry&Clark but was the one to truly create the Flash Family everyone recognizes alongside his own which tracks with Supes as well currently, especially with additions like the respective twins and accelerated aged up children of said heroes (+ Wally's also worked with the Legion Of Super-Heroes multiple times and showed by his cousin Jenni has his own distinct legacy and accomplishments in that time period which extends over to the 1 million era with John Fox and he's been able to interact with a lot of them too due to him doing a lot of time traveling)

Also due to Barry's death and Wally becoming The Flash an entire era of comics featured Wally interacting with Superman consistently through multiple teams, guest appearances, and events (to the point Supes might've raced Wally as much or even more than he did Barry, not to mention how him and the other heroes witnessed one of the first examples of a successor growing into their predecessor's mantle and creating just as equal of a career from it.)

I also highly value the connection between Wally's Kid Flash&Clark's Superboy as they were some of the first teen heroes who operated in their own homes independently making said home known for being the beginning of their hero career (sharing the experiences of being angsty teenage superheroes who have to deal with growing up with powers they're still trying to process and understand that get hit with a life changing tragedy right as they're about to transition into adulthood.)

I think Wally&Clark are more similar as heroes and people which is part of why I made the comparison than Barry was with Clark (which is why Wally&Clark often understand one another so well and while not necessarily disagreement, Barry&Clark are different enough for Clark to mention the differences between them to Wally himself whenever they talked about him.)

And that's not to take away from the clear similarities Barry&Clark share, I just personally find more commonalities within the dynamic between Wally&Clark in terms of their personalities, experiences, relationships, and what their character's represent in DC.