I know that the Techma electric toilet has an over flow lockout, but I don't know of any other RV toilets that offer that. Nor do I know of any aftermarket add on to do this - unless you add on a Techma toilet.
We have no idea what RV you have - that would help to know.
Most folks add their RV details to their Signature in their Profile and it shows on every post, like mine below.
If you'd like to do that, too just click on UserCP on the left on the top menubar. Then click on Edit Signature on the Control Panel's left hand column.
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2017 Winnebago Adventurer 37F
2024 Lincoln Nautilus Hybrid Toad
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