The TPI-440 is another such multimeter/scope combination.
I have one, and I do not recommend it. On the positive side, it does display waveforms, and can tell when clipping happens and that sort of thing. You can display waveforms of AC mains supplied by a utility company or by an inverter, and you can easily see the difference between "true sine" and "modified sine" wave inverters. It is of course isolated. You can feed a sine or triangle wave into an audio amplifier and look at the output to check if it is clipping.
On the bad side, its display is low contrast, the menu system is difficult to use and slow to respond. The scope waveform display is always AC coupled, which makes some kinds of measurements difficult. The bandwidth is narrow, basically only suitable for audio (as you'd expect from something that uses banana jacks and multimeter probes for input). The device costs more than an entry level Rigol, and offers a LOT less functionality. The only advantage the TPI-440 has over a cheaper Rigol is that the TPI is smaller, battery operated, and isolated. There are a few special use cases where that might be an advantage, but...
I don't recommend it, but you asked if there were other similar devices, and this is one.
(FYI, at the time I bought mine, probably 15 years ago, it was significantly cheaper than an entry level "real" scope. In the meantime, scopes have come down in price, but this TPI-440 seems to have kept the same price.)