PB snuck another drop in last night, handful of Build Fighters kits for May delivery. It doesn't look like anything sold out so far. That Psycho GM is a definite for me. Kirara's Gerbera Tetra adds some color depth the original deco is sorely missing IMO. The Z'Gok kit is positively ancient, but Meijin was kind enough to stick on some new big beefy arms. I've never been a Jegan fan but there's a couple of variants for those that are. And while I like design of X, the HG kits and their variants do nothing for me for whatever reason.
Gundam doesn't really fit those descriptors at all π But... there is the Build Fighters series, which takes place in near-future real-world. It focuses on fans of Gundam model kits, and technology that scans the kits and lets them battle. It's not slice of life, but it's (mostly) kids and low-stakes conflict revolving around competition.
Opinions vary on which entries are the strongest or weakest, but IMO the first entry (Build Fighters) is fantastic, and really nails the whole fan enthusiasm feel. A lot of the references are going to be lost on people who aren't already fans of the franchise, but it executes on the shonen format well enough to stand on its own.
Edit: Honorable mention for slice of life goes to The Witch From Mercury, which made a lot of people very angry for hitting some of those notes early on.