At A2, in the Oxford Learner’s Dictionary, the adverbial phrase:
a little (bit) = to a small degree
Although ‘a little‘ exists in the EGP, there is no entry for it to modify an adjective unless it contains ‘a (little) BIT’ + COMPARATIVE at B1. We checked the EVP and found that it exists modifying an adjective at B2. There is also nothing specific about ‘a little’ modifying other adverbs.
Expanded in iWeb:
a little _JJ
1 A LITTLE EXTRA 48606
2 A LITTLE DIFFERENT 45216
3 A LITTLE NERVOUS 10624
4 A LITTLE HIGHER 10480
5 A LITTLE TRICKY 9939
That makes it a little tricky.
6 A LITTLE HARD 9032
7 A LITTLE EASIER 8678
8 A LITTLE DIFFICULT 8232
9 A LITTLE LONGER 7892
10 A LITTLE DISAPPOINTED 7802
11 A LITTLE BIGGER 7248
12 A LITTLE CONFUSING 7082
13 A LITTLE WEIRD 7043
14 A LITTLE CRAZY 6884
15 A LITTLE LATE 6230
16 A LITTLE HARDER 6206
17 A LITTLE ODD 6161
18 A LITTLE SURPRISED 6153
19 A LITTLE STRANGE 6143
20 A LITTLE SMALLER 5960
21 A LITTLE OLDER 5902
22 A LITTLE LOWER 5655
23 A LITTLE CONCERNED 5632
24 A LITTLE BETTER 5559
25 A LITTLE SLOW 5412
26 A LITTLE HIGH 5328
27 A LITTLE SHORT 5169
28 A LITTLE LARGER 5026
29 A LITTLE ROUGH 4713
30 A LITTLE PRICEY 4685
a little more _JJ
1 A LITTLE MORE DIFFICULT 5315
This is going to be a little more difficult than I thought.
2 A LITTLE MORE COMPLICATED 5148
3 A LITTLE MORE EXPENSIVE 3780
4 A LITTLE MORE COMPLEX 2353
5 A LITTLE MORE INTERESTING 2134
6 A LITTLE MORE FUN 1941
7 A LITTLE MORE COMFORTABLE 1626
8 A LITTLE MORE CHALLENGING 1592
9 A LITTLE MORE CREATIVE 1063
10 A LITTLE MORE SPECIFIC 1030
11 A LITTLE MORE SPECIAL 978
12 A LITTLE MORE AGGRESSIVE 828
13 A LITTLE MORE SERIOUS 797
14 A LITTLE MORE TRICKY 778
15 A LITTLE MORE EXCITING 764
16 A LITTLE MORE ADVENTUROUS 716
17 A LITTLE MORE RELAXED 707
18 A LITTLE MORE ADVANCED 697
19 A LITTLE MORE CAREFUL 678
20 A LITTLE MORE SUBTLE 662
21 A LITTLE MORE PERSONAL 660
22 A LITTLE MORE FLEXIBLE 643
23 A LITTLE MORE SOPHISTICATED 558
24 A LITTLE MORE CLEAR 545
25 A LITTLE MORE LIGHT 545
26 A LITTLE MORE FORGIVING 540
27 A LITTLE MORE OPEN 530
28 A LITTLE MORE CONFIDENT 514
29 A LITTLE MORE UNIQUE 512
30 A LITTLE MORE BEARABLE 486
Also, note ‘a little bit’ at A2:
I‘m afraid Ash is feeling a little bit under the weather.