In the 60s, Jackie Gleason as Ralph Kramden made an appearance on Here’s Lucy at the very end. He just says How Sweet It Is.

In the 90s, Audrey and Joyce reprise their roles in Hi Honey I’m Home. Alice talks about Ralph being a baby.

What about it?

I would say no. They're just cameos.

In the 60s, Jackie Gleason as Ralph Kramden made an appearance on Here’s Lucy at the very end. He just says How Sweet It Is.
I saw that clip on YouTube. He looks like he's doing The Poor Soul up until the end there. It's like he's dressed as Kramden, does The Poor Soul, and turns into Gleason at the end.