Here are a couple of BBD pedals with tap tempo –
EHX Deluxe Memory Boy
MXR Carbon Copy Deluxe
Presumably you are asking about this because you might expect to be able to tap in a tempo and have repeats match that tempo.
However, the echo uses 3 virtual heads which can be switched on/off in different combinations, each with their own min/max value that you are scaling with the time control.
Therefore, linking tap tempo to, say, the first head would not give you what you might expect with the second and would only make some sense in the modes that include that first head.
The differences in timing between the virtual heads are also a big part of the sound.
Echo is designed to give a smeary, spacey, thick echo effect, not exact tap tempo’d repeats.
The Stereo Tap delay and BBD already have this covered 🙂
Cheers,
Keith.