As far as Tomb Raider goes, it's surprisingly present on Nintendo consoles, having games on the Wii, Nintendo DS, Game Cube, Game Boy Advance, and Game Boy Color (I still can't get over that. lol). The series skipped the Wii U, and is currently in the AAA PC/Playstation game space where it's meant for high end graphics cards, so a Switch port wouldn't likely be feasible. Whether or not Nintendo gamers would have seen much of Lara Croft, I'm not sure.
I do know that Lara is still considered to be one of the biggest icons in gaming, especially as one of the first big female action heroes in the medium alongside Samus and Chun-Li.
When it comes to Super Smash Bros. though, Lara has to compete with Final Fantasy, and Dragon Quest, and as prolific as the Tomb Raider series is, I do think it kind of the second banana in comparison to two of the biggest RPG series ever (I was going to say the two biggest, but then I remembered Pokémon). Lara's also going head to head with games that the community is more predisposed to like, or at least think about, such as Neir Automata, Super Mario RPG, and Chrono Trigger. Due to, like, two users here, even The World Ends With You gets mentioned more often than Tomb Raider, which is strange, but them's the breaks I guess.
One last thing that likely keeps her from entering speculation is that from what I've seen, Super Smash Bros. kind of needs more characters from realistic (well...pretending to be realistic anyway) settings before people will be convinced that characters from these kinds of settings gave anything new or interesting to bring to the table.