I'd say the average DAB+ receiver is unlikely to support AAC-LD or AAC-ELD, because AAC used in DAB+ (optionally with SBR and PS) uses a 960 granule length, unlike most AAC used elsewhere, which uses 1024. I don't know if ELD or LD exist for this granule length. The AAC codec is used in superframe-mode, with 120ms frame duration.
Regarding delay in general in a DAB transmission chain:
Some latency also comes from the time interleaver (see ETSI EN 300 401 v2.1.1 Clause 12)
In transmission mode I (the only one used since v2), one transmission frame lasts 96ms, also adding to the end-to-end latency
As @frank-johnson also mentioned, the distribution network sending ETI to all modulators of the transmitter network can also add several seconds of delay.
DAB wasn't designed for low-delay applications, and the latency of the codec only makes up a small part of the overall end-to-end delay.
If you want to experiment with generating DAB signals, have a look at http://www.opendigitalradio.org.