Anthony Edwards had the most games by a rookie with 20+ points in 2020-21, with 36 games.

most 20 or more point games by a rookie in the nba 2021

NAME	GP	PTS	SEASON	TM	MPG	PPG	RPG	APG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	MIN	REB	AST	STL	BLK	TOV	PF	+/-
Anthony Edwards	36	937	2020-21	MIN	35.1	26.0	5.1	3.2	1.5	0.7	2.3	9.4	19.9	47.1	3.2	8.4	38.0	4.1	5.3	77.2	1,262	184	115	54	25	84	82	-93
LaMelo Ball	17	409	2020-21	CHA	33.8	24.1	6.6	6.9	1.8	0.3	3.1	8.5	16.0	53.3	3.1	6.5	47.3	3.9	4.8	81.7	574	113	118	30	5	52	55	+85
Saddiq Bey	12	279	2020-21	DET	33.0	23.3	6.5	2.0	1.3	0.3	1.3	7.6	15.5	48.9	5.2	10.2	50.8	2.9	3.3	87.5	397	78	24	16	4	15	24	-34
Immanuel Quickley	11	259	2020-21	NYK	27.4	23.5	3.1	3.2	0.7	0.2	0.9	7.7	15.1	51.2	3.9	8.0	48.9	4.2	4.5	92.0	302	34	35	8	2	10	26	+98
Tyrese Haliburton	9	208	2020-21	SAC	35.2	23.1	3.2	5.8	1.7	0.6	1.4	8.9	15.2	58.4	3.9	7.1	54.7	1.4	1.7	86.7	317	29	52	15	5	13	7	+64
Jae'Sean Tate	6	132	2020-21	HOU	34.9	22.0	5.7	3.7	1.2	0.3	1.3	8.5	13.5	63.0	2.5	4.8	51.7	2.5	3.7	68.2	209	34	22	7	2	8	20	-10
Aleksej Pokusevski	5	118	2020-21	OKC	36.1	23.6	7.6	3.2	0.4	0.2	3.4	8.2	15.4	53.2	5.0	8.8	56.8	2.2	3.0	73.3	180	38	16	2	1	17	5	-25
KJ Martin	5	117	2020-21	HOU	38.2	23.4	8.2	4.0	0.8	1.2	1.6	8.8	15.4	57.1	3.4	6.0	56.7	2.4	3.4	70.6	191	41	20	4	6	8	15	-57
Theo Maledon	5	124	2020-21	OKC	33.8	24.8	4.6	4.6	1.0	0.6	3.2	7.8	14.4	54.2	4.4	7.8	56.4	4.8	5.4	88.9	169	23	23	5	3	16	7	-88
Malachi Flynn	4	95	2020-21	TOR	39.4	23.8	4.3	6.0	2.0	0.3	1.3	8.8	18.8	46.7	4.0	9.3	43.2	2.3	2.8	81.8	158	17	24	8	1	5	8	-8
Cole Anthony	4	104	2020-21	ORL	33.4	26.0	6.5	3.0	1.3	0.3	4.0	7.5	16.5	45.5	3.3	6.3	52.0	7.8	8.5	91.2	134	26	12	5	1	16	15	-18
Payton Pritchard	4	93	2020-21	BOS	29.5	23.3	3.3	3.8	0.3	0.3	1.8	7.8	12.8	60.8	4.5	7.3	62.1	3.3	3.5	92.9	118	13	15	1	1	7	9	+13
Isaac Okoro	3	74	2020-21	CLE	40.6	24.7	6.3	3.3	0.7	0.0	1.0	8.7	17.3	50.0	2.3	6.7	35.0	5.0	5.7	88.2	122	19	10	2	0	3	5	-46
Jordan Nwora	3	79	2020-21	MIL	34.8	26.3	10.0	1.3	1.3	1.0	2.0	10.0	19.0	52.6	4.0	8.7	46.2	2.3	4.0	58.3	104	30	4	4	3	6	5	-11
Desmond Bane	3	64	2020-21	MEM	29.3	21.3	5.3	2.0	1.3	0.0	1.7	8.0	13.3	60.0	4.3	8.0	54.2	1.0	1.3	75.0	88	16	6	4	0	5	5	-29
Saben Lee	3	63	2020-21	DET	26.1	21.0	3.7	5.3	1.3	0.7	2.7	7.7	10.3	74.2	1.0	1.0	100.0	4.7	6.0	77.8	78	11	16	4	2	8	8	+13
Patrick Williams	3	67	2020-21	CHI	31.1	22.3	6.0	2.0	1.7	0.7	0.3	8.3	13.0	64.1	1.3	3.0	44.4	4.3	5.0	86.7	93	18	6	5	2	1	8	-13
Tyrese Maxey	3	91	2020-21	PHI	37.9	30.3	6.3	5.3	1.7	0.7	1.3	12.0	21.0	57.1	2.7	5.0	53.3	3.7	4.0	91.7	114	19	16	5	2	4	9	+24
Markus Howard	2	43	2020-21	DEN	33.0	21.5	3.5	2.5	0.5	0.5	3.0	8.5	15.5	54.8	3.0	7.0	42.9	1.5	1.5	100.0	66	7	5	1	1	6	3	+11
Armoni Brooks	2	44	2020-21	HOU	33.9	22.0	4.0	1.0	1.0	0.0	1.5	8.0	17.0	47.1	5.0	12.5	40.0	1.0	1.5	66.7	68	8	2	2	0	3	3	-14
Anthony Lamb	2	43	2020-21	HOU	33.2	21.5	3.0	1.5	0.5	0.0	2.5	7.5	14.5	51.7	4.0	9.0	44.4	2.5	2.5	100.0	66	6	3	1	0	5	7	-8
James Wiseman	2	45	2020-21	GSW	24.8	22.5	6.0	2.0	0.0	1.0	2.0	8.5	12.5	68.0	1.5	1.5	100.0	4.0	5.5	72.7	50	12	4	0	2	4	7	+29
Onyeka Okongwu	1	21	2020-21	ATL	32.9	21.0	15.0	3.0	2.0	2.0	1.0	10.0	13.0	76.9	0.0	0.0		1.0	3.0	33.3	33	15	3	2	2	1	2	+17
Precious Achiuwa	1	23	2020-21	MIA	41.6	23.0	10.0	0.0	2.0	1.0	2.0	10.0	16.0	62.5	0.0	0.0		3.0	7.0	42.9	42	10	0	2	1	2	3	+6
Josh Hall	1	25	2020-21	OKC	42.7	25.0	10.0	2.0	0.0	0.0	3.0	11.0	21.0	52.4	1.0	6.0	16.7	2.0	6.0	33.3	43	10	2	0	0	3	5	+9